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Virginia - Science: Biology
Standards of Learning | Adopted: 2010
BIO.1: : The student will demonstrate an understanding of scientific reasoning, logic, and the nature of science by planning and conducting investigations in which
BIO.1: : The student will demonstrate an understanding of scientific reasoning, logic, and the nature of science by planning and conducting investigations in which

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview
BIO.1.a: : observations of living organisms are recorded in the lab and in the field;
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.1.b: : hypotheses are formulated based on direct observations and information from scientific literature;

Temperature and Sex Determination - Metric
Observe the sex ratios of birds and geckos as they hatch in an incubator. Vary the temperature of the incubator and measure the percentages of male and female hatchlings to determine if temperature has an effect on sex. 5 Minute Preview
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.1.c: : variables are defined and investigations are designed to test hypotheses;
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Effect of Environment on New Life Form
Using the scientific method, control the environmental conditions for a fictional alien organism in order to learn how the organism responds to changes in conditions. Sunlight, water, and temperature can be varied to determine their effects on the shape of the aliens. 5 Minute Preview
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Pendulum Clock
Find the effect of length, mass, and angle on the period of a pendulum. The pendulum is attached to a clock that can be adjusted to tell time accurately. The clock can be located on Earth or Jupiter to determine the effect of gravity. 5 Minute Preview

Real-Time Histogram
Try to click your mouse once every 2 seconds. The time interval between each click is recorded, as well as the error and percent error. Data can be displayed in a table, histogram, or scatter plot. Observe and measure the characteristics of the resulting distribution when large amounts of data are collected. 5 Minute Preview
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Sight vs. Sound Reactions
Measure your reaction time by clicking your mouse as quickly as possible when visual or auditory stimuli are presented. The individual response times are recorded, as well as the mean and standard deviation for each test. A histogram of data shows overall trends in sight and sound response times. The type of test as well as the symbols and sounds used are chosen by the user. 5 Minute Preview
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.1.d: : graphing and arithmetic calculations are used as tools in data analysis;
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Seasons Around the World
Use a three dimensional view of the Earth, Moon and Sun to explore seasonal changes at a variety of locations. Strengthen your knowledge of global climate patterns by comparing solar energy input at the Poles to the Equator. Manipulate Earth's axis to increase or diminish seasonal changes. 5 Minute Preview
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.1.e: : conclusions are formed based on recorded quantitative and qualitative data;
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.1.f: : sources of error inherent in experimental design are identified and discussed;
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Real-Time Histogram
Try to click your mouse once every 2 seconds. The time interval between each click is recorded, as well as the error and percent error. Data can be displayed in a table, histogram, or scatter plot. Observe and measure the characteristics of the resulting distribution when large amounts of data are collected. 5 Minute Preview
BIO.1.g: : validity of data is determined;

Nitrogen Cycle - High School
An infant on a farm has blue baby syndrome. As an EPA environmental engineer, students must find the cause of the baby's illness. Using environment data, students learn the importance of the nitrogen cycle and how human factors can impact nature. Video Preview
BIO.1.i: : appropriate technology including computers, graphing calculators, and probeware, is used for gathering and analyzing data, communicating results, modeling concepts, and simulating experimental conditions;
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Electromagnetic Induction
Explore how a changing magnetic field can induce an electric current. A magnet can be moved up or down at a constant velocity below a loop of wire, or the loop of wire may be dragged in any direction or rotated. The magnetic and electric fields can be displayed, as well as the magnetic flux and the current in the wire. 5 Minute Preview
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview

Osmosis - High School
As a veterinarian, students help a young calf, named Clark, who is having seizures. To determine the cause, the students fly into Clark's brain to learn about osmosis and apply their learning to save Clark. Video Preview
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Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.1.m: : current applications of biological concepts are used.
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.2: : The student will investigate and understand the chemical and biochemical principles essential for life.
BIO.2: : The student will investigate and understand the chemical and biochemical principles essential for life.
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Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.2.b: : the structure and function of macromolecules;
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.2.c: : the nature of enzymes; and
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Enzymes - High School
As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight. Video Preview
BIO.2.d: : the capture, storage, transformation, and flow of energy through the processes of photosynthesis and respiration.

Cell Energy Cycle
Explore the processes of photosynthesis and respiration that occur within plant and animal cells. The cyclical nature of the two processes can be constructed visually, and the simplified photosynthesis and respiration formulae can be balanced. 5 Minute Preview
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Food Chain
In this ecosystem consisting of hawks, snakes, rabbits and grass, the population of each species can be studied as part of a food chain. Disease can be introduced for any species, and the number of animals can be increased or decreased at any time, just like in the real world. 5 Minute Preview
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Photosynthesis Lab
Study photosynthesis in a variety of conditions. Oxygen production is used to measure the rate of photosynthesis. Light intensity, carbon dioxide levels, temperature, and wavelength of light can all be varied. Determine which conditions are ideal for photosynthesis, and understand how limiting factors affect oxygen production. 5 Minute Preview

Pond Ecosystem
Measure the temperature and oxygen content of a pond over the course of a day. Then go fishing to see what types of fish live in the pond. Many different ponds can be investigated to determine the influence of time, temperature, and farms on oxygen levels. 5 Minute Preview
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Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.3: : The student will investigate and understand relationships between cell structure and function.
BIO.3: : The student will investigate and understand relationships between cell structure and function.

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.3.a: : evidence supporting the cell theory;

Paramecium Homeostasis
Observe how a paramecium maintains stable internal conditions in a changing aquatic environment. Water moves into the organism by osmosis, and is pumped out by the contractile vacuole. The concentration of solutes in the water will determine the rate of contractions in the paramecium. 5 Minute Preview
BIO.3.b: : characteristics of prokaryotic and eukaryotic cells;

Cell Structure
Select a sample cell from an animal, plant, or bacterium and view the cell under a microscope. Select each organelle on the image to learn more about its structure and function. Closeup views and animations of certain organelles is provided. 5 Minute Preview

Cell Types
Explore a wide variety of cells, from bacteria to human neurons, using a compound light microscope. Select a sample to study, then focus on the sample using the coarse and fine focus controls of the microscope. Compare the structures found in different cells, then perform tests to see if the sample is alive. 5 Minute Preview

Paramecium Homeostasis
Observe how a paramecium maintains stable internal conditions in a changing aquatic environment. Water moves into the organism by osmosis, and is pumped out by the contractile vacuole. The concentration of solutes in the water will determine the rate of contractions in the paramecium. 5 Minute Preview

Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview
BIO.3.c: : similarities between the activities of the organelles in a single cell and a whole organism;

Paramecium Homeostasis
Observe how a paramecium maintains stable internal conditions in a changing aquatic environment. Water moves into the organism by osmosis, and is pumped out by the contractile vacuole. The concentration of solutes in the water will determine the rate of contractions in the paramecium. 5 Minute Preview
BIO.3.d: : the cell membrane model; and

Cell Structure
Select a sample cell from an animal, plant, or bacterium and view the cell under a microscope. Select each organelle on the image to learn more about its structure and function. Closeup views and animations of certain organelles is provided. 5 Minute Preview

Cell Respiration - High School
As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned. Video Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Osmosis - High School
As a veterinarian, students help a young calf, named Clark, who is having seizures. To determine the cause, the students fly into Clark's brain to learn about osmosis and apply their learning to save Clark. Video Preview
BIO.3.e: : the impact of surface area to volume ratio on cell division, material transport, and other life processes.

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.4: : The student will investigate and understand life functions of Archaea, Bacteria and Eukarya.
BIO.4.b: : maintenance of homeostasis;

Osmosis - High School
As a veterinarian, students help a young calf, named Clark, who is having seizures. To determine the cause, the students fly into Clark's brain to learn about osmosis and apply their learning to save Clark. Video Preview
BIO.4.c: : how the structures and functions vary among and within the Eukarya kingdoms of protists, fungi, plants, and animals, including humans;

Digestive System
Digestion is a complex process, involving a wide variety of organs and chemicals that work together to break down food, absorb nutrients, and eliminate wastes. But have you ever wondered what would happen if some of those organs were eliminated, or if the sequence was changed? Can the digestive system be improved? Find out by designing your own digestive system with the Digestive System Gizmo. 5 Minute Preview

Paramecium Homeostasis
Observe how a paramecium maintains stable internal conditions in a changing aquatic environment. Water moves into the organism by osmosis, and is pumped out by the contractile vacuole. The concentration of solutes in the water will determine the rate of contractions in the paramecium. 5 Minute Preview

Pollination: Flower to Fruit
Label a diagram that illustrates the anatomy of a flower, and understand the function of each structure. Compare the processes of self pollination and cross pollination, and explore how fertilization takes place in a flowering plant. 5 Minute Preview
BIO.4.d: : human health issues, human anatomy, and body systems;

Circulatory System
Trace the path of blood through a beating heart and the network of blood vessels that supplies blood to the body. Take blood samples from different blood vessels to observe blood cells and measure the levels of oxygen, carbon dioxide, sugar, and urea. 5 Minute Preview

Digestive System
Digestion is a complex process, involving a wide variety of organs and chemicals that work together to break down food, absorb nutrients, and eliminate wastes. But have you ever wondered what would happen if some of those organs were eliminated, or if the sequence was changed? Can the digestive system be improved? Find out by designing your own digestive system with the Digestive System Gizmo. 5 Minute Preview

Diffusion - High School
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash. Video Preview
BIO.5: : The student will investigate and understand common mechanisms of inheritance and protein synthesis.
BIO.5.a: : cell growth and division;

Cell Division
Begin with a single cell and watch as mitosis and cell division occurs. The cells will go through the steps of interphase, prophase, metaphase, anaphase, telophase, and cytokinesis. The length of the cell cycle can be controlled, and data related to the number of cells present and their current phase can be recorded. 5 Minute Preview

Meiosis
Explore how sex cells are produced by the process of meiosis. Compare meiosis in male and female germ cells, and use crossovers to increase the number of possible gamete genotypes. Using meiosis and crossovers, create "designer" fruit fly offspring with desired trait combinations. 5 Minute Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview
BIO.5.b: : gamete formation;

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview
BIO.5.d: : prediction of inheritance of traits based on the Mendelian laws of heredity;

Fast Plants® 1 - Growth and Genetics
Grow Wisconsin Fast Plants® in a simulated lab environment. Explore the life cycles of these plants and how their growth is influenced by light, water, and crowding. Practice pollinating the plants using bee sticks, then observe the traits of the offspring plants. Use Punnett squares to model the inheritance of genes for stem color and leaf color for these plants. 5 Minute Preview

Hardy-Weinberg Equilibrium
Set the initial percentages of three types of parrots in a population and track changes in genotype and allele frequency through several generations. Analyze population data to develop an understanding of the Hardy-Weinberg equilibrium. Determine how initial allele percentages will affect the equilibrium state of the population. 5 Minute Preview

Microevolution
Observe the effect of predators on a population of parrots with three possible genotypes. The initial percentages and fitness levels of each genotype can be set. Determine how initial fitness levels affect genotype and allele frequencies through several generations. Compare scenarios in which a dominant allele is deleterious, a recessive allele is deleterious, and the heterozygous individual is fittest. 5 Minute Preview

Mouse Genetics (One Trait)
Breed "pure" mice with known genotypes that exhibit specific fur colors, and learn how traits are passed on via dominant and recessive genes. Mice can be stored in cages for future breeding, and the statistics of fur color are reported every time a pair of mice breed. Punnett squares can be used to predict results. 5 Minute Preview

Mouse Genetics (Two Traits)
Breed "pure" mice with known genotypes that exhibit specific fur and eye colors, and learn how traits are passed on via dominant and recessive genes. Mice can be stored in cages for future breeding, and the statistics of fur and eye color are reported every time a pair of mice breed. Punnett squares can be used to predict results. 5 Minute Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview
BIO.5.f: : genetic variation;

Evolution: Mutation and Selection
Observe evolution in a fictional population of bugs. Set the background to any color, and see natural selection taking place. Inheritance of color occurs according to Mendel's laws and probability. Mutations occur at random, and probability of capture by predators is determined by the insect's camouflage. 5 Minute Preview

Fast Plants® 2 - Mystery Parent
In this follow-up to Fast Plants® 1 - Growth and Genetics, continue to explore inheritance of traits in Wisconsin Fast Plants. Infer the genotype of a "mystery P2 parent" of a set of Fast Plants based on the traits of the P1, F1, and F2 plants. Then create designer Fast Plants by selectively breeding plants with desired traits. 5 Minute Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Meowsis - High School
As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring. Video Preview
BIO.5.g: : the structure, function, and replication of nucleic acids;

Building DNA
Construct a DNA molecule, examine its double-helix structure, and then go through the DNA replication process. Learn how each component fits into a DNA molecule, and see how a unique, self-replicating code can be created. 5 Minute Preview
BIO.5.h: : events involved in the construction of proteins;

RNA and Protein Synthesis
Go through the process of synthesizing proteins through RNA transcription and translation. Learn about the many steps involved in protein synthesis including: unzipping of DNA, formation of mRNA, attaching of mRNA to the ribosome, and linking of amino acids to form a protein. 5 Minute Preview

Protein Synthesis - High School
As a pediatrician, students learn about genes and protein synthesis to try to help a baby girl named Lucy who has an immunodeficiency disease. Video Preview
BIO.5.j: : exploration of the impact of DNA technologies.

DNA Analysis
Scan the DNA of frogs to produce DNA sequences. Use the DNA sequences to identify possible identical twins and to determine which sections of DNA code for skin color, eye color, and the presence or absence of spots. 5 Minute Preview

Genetic Engineering
Use genetic engineering techniques to create corn plants resistant to insect pests or tolerant of herbicides. Identify useful genes from bacteria, insert the desired gene into a corn plant, and then compare the modified plant to a control plant in a lab setting. 5 Minute Preview
BIO.6: : The student will investigate and understand bases for modern classification systems.
BIO.6.a: : structural similarities among organisms;

Dichotomous Keys
Use dichotomous keys to identify and classify five types of organisms: California albatrosses, Canadian Rockies buttercups, Texas venomous snakes, Virginia evergreens, and Florida cartilagenous fishes. After you have classified every organism, try making your own dichotomous key! 5 Minute Preview

Human Evolution - Skull Analysis
Compare the skulls of a variety of significant human ancestors, or hominids. Use available tools to measure lengths, areas, and angles of important features. Each skull can be viewed from the front, side, or from below. Additional information regarding the age, location, and discoverer of each skull can be displayed. 5 Minute Preview
BIO.6.b: : fossil record interpretation;

Human Evolution - Skull Analysis
Compare the skulls of a variety of significant human ancestors, or hominids. Use available tools to measure lengths, areas, and angles of important features. Each skull can be viewed from the front, side, or from below. Additional information regarding the age, location, and discoverer of each skull can be displayed. 5 Minute Preview
BIO.6.d: : examination of biochemical similarities and differences among organisms; and

Dichotomous Keys
Use dichotomous keys to identify and classify five types of organisms: California albatrosses, Canadian Rockies buttercups, Texas venomous snakes, Virginia evergreens, and Florida cartilagenous fishes. After you have classified every organism, try making your own dichotomous key! 5 Minute Preview
BIO.7: : The student will investigate and understand how populations change through time.
BIO.7.a: : evidence found in fossil records;

Human Evolution - Skull Analysis
Compare the skulls of a variety of significant human ancestors, or hominids. Use available tools to measure lengths, areas, and angles of important features. Each skull can be viewed from the front, side, or from below. Additional information regarding the age, location, and discoverer of each skull can be displayed. 5 Minute Preview
BIO.7.b: : how genetic variation, reproductive strategies, and environmental pressures impact the survival of populations;

Microevolution
Observe the effect of predators on a population of parrots with three possible genotypes. The initial percentages and fitness levels of each genotype can be set. Determine how initial fitness levels affect genotype and allele frequencies through several generations. Compare scenarios in which a dominant allele is deleterious, a recessive allele is deleterious, and the heterozygous individual is fittest. 5 Minute Preview

Natural Selection
You are a bird hunting moths (both dark and light) that live on trees. As you capture the moths most easily visible against the tree surface, the moth populations change, illustrating the effects of natural selection. 5 Minute Preview

Rabbit Population by Season
Observe the population of rabbits in an environment over many years. The land available to the rabbits and weather conditions can be adjusted to investigate the effects of urban sprawl and unusual weather on wildlife populations. 5 Minute Preview

Rainfall and Bird Beaks - Metric
Study the thickness of birds' beaks over a five year period as you control the yearly rainfall on an isolated island. As the environmental conditions change, the species must adapt (a real-world consequence) to avoid extinction. 5 Minute Preview
BIO.7.c: : how natural selection leads to adaptations;

Evolution: Mutation and Selection
Observe evolution in a fictional population of bugs. Set the background to any color, and see natural selection taking place. Inheritance of color occurs according to Mendel's laws and probability. Mutations occur at random, and probability of capture by predators is determined by the insect's camouflage. 5 Minute Preview

Evolution: Natural and Artificial Selection
Observe evolution in a fictional population of bugs. Set the background to any color, and see natural selection taking place. Compare the processes of natural and artificial selection. Manipulate the mutation rate, and determine how mutation rate affects adaptation and evolution. 5 Minute Preview

Natural Selection
You are a bird hunting moths (both dark and light) that live on trees. As you capture the moths most easily visible against the tree surface, the moth populations change, illustrating the effects of natural selection. 5 Minute Preview

Rainfall and Bird Beaks - Metric
Study the thickness of birds' beaks over a five year period as you control the yearly rainfall on an isolated island. As the environmental conditions change, the species must adapt (a real-world consequence) to avoid extinction. 5 Minute Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview
BIO.7.e: : scientific evidence and explanations for biological evolution.

Embryo Development
Explore how a fertilized cell develops into an embryo, a fetus, and eventually an adult organism. Compare embryo development in different vertebrate species and try to guess which embryo belongs to each species. Use dyes to trace the differentiation of cells during early embryo development, from the zygote to the neurula. 5 Minute Preview

Evolution: Mutation and Selection
Observe evolution in a fictional population of bugs. Set the background to any color, and see natural selection taking place. Inheritance of color occurs according to Mendel's laws and probability. Mutations occur at random, and probability of capture by predators is determined by the insect's camouflage. 5 Minute Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview
BIO.8: : The student will investigate and understand dynamic equilibria within populations, communities, and ecosystems.
BIO.8.a: : interactions within and among populations including carrying capacities, limiting factors, and growth curves;
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Coral Reefs 1 - Abiotic Factors
Explore the abiotic factors that affect Caribbean coral reefs. Many factors can be manipulated in this simplified reef model, including ocean temperature and pH, storm severity, and input of excess sediments and nutrients from logging, sewage, and agriculture. Click "Advance year" to see how the reef responds to these changes. 5 Minute Preview
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Food Chain
In this ecosystem consisting of hawks, snakes, rabbits and grass, the population of each species can be studied as part of a food chain. Disease can be introduced for any species, and the number of animals can be increased or decreased at any time, just like in the real world. 5 Minute Preview
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Rabbit Population by Season
Observe the population of rabbits in an environment over many years. The land available to the rabbits and weather conditions can be adjusted to investigate the effects of urban sprawl and unusual weather on wildlife populations. 5 Minute Preview
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Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.8.b: : nutrient cycling with energy flow through ecosystems;
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Cell Energy Cycle
Explore the processes of photosynthesis and respiration that occur within plant and animal cells. The cyclical nature of the two processes can be constructed visually, and the simplified photosynthesis and respiration formulae can be balanced. 5 Minute Preview
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Food Chain
In this ecosystem consisting of hawks, snakes, rabbits and grass, the population of each species can be studied as part of a food chain. Disease can be introduced for any species, and the number of animals can be increased or decreased at any time, just like in the real world. 5 Minute Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
BIO.8.d: : the effects of natural events and human activities on ecosystems; and

Coral Reefs 1 - Abiotic Factors
Explore the abiotic factors that affect Caribbean coral reefs. Many factors can be manipulated in this simplified reef model, including ocean temperature and pH, storm severity, and input of excess sediments and nutrients from logging, sewage, and agriculture. Click "Advance year" to see how the reef responds to these changes. 5 Minute Preview

Coral Reefs 2 - Biotic Factors
In this followup to the Coral Reefs 1 - Abiotic Factors activity, investigate the impacts of fishing, disease, and invasive species on a model Caribbean coral reef. Many variables can be manipulated, included intensity of fishing, presence of black band and white band disease, and the presence of actual and potential invasive species. Click "Advance year" to see the impacts of these biotic changes. 5 Minute Preview
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Pond Ecosystem
Measure the temperature and oxygen content of a pond over the course of a day. Then go fishing to see what types of fish live in the pond. Many different ponds can be investigated to determine the influence of time, temperature, and farms on oxygen levels. 5 Minute Preview

Evolution - High School
Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the outbreak. Video Preview

Nitrogen Cycle - High School
An infant on a farm has blue baby syndrome. As an EPA environmental engineer, students must find the cause of the baby's illness. Using environment data, students learn the importance of the nitrogen cycle and how human factors can impact nature. Video Preview

Photosynthesis - High School
As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching. Video Preview
Correlation last revised: 9/16/2020
About STEM Cases
Students assume the role of a scientist trying to solve a real world problem. They use scientific practices to collect and analyze data, and form and test a hypothesis as they solve the problems.
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Each STEM Case uses realtime reporting to show live student results.
Introduction to the Heatmap
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STEM Cases take between 30-90 minutes for students to complete, depending on the case.
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Student progress is automatically saved so that STEM Cases can be completed over multiple sessions.
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Multiple grade-appropriate versions, or levels, exist for each STEM Case.
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Each STEM Case level has an associated Handbook. These are interactive guides that focus on the science concepts underlying the case.
How Free Gizmos Work
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Start teaching with 20-40 Free Gizmos. See the full list.
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Access lesson materials for Free Gizmos including teacher guides, lesson plans, and more.
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All other Gizmos are limited to a 5 Minute Preview and can only be used for 5 minutes a day.
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Free Gizmos change each semester. The new collection will be available January 1 and July 1.
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