LS 2.1

The place within an ecosystem that provides the biotic and abiotic factors an organism needs to survive and reproduce

• population

• community

• ecosystem

• habitat

• niche

An organism that uses an outside energy source, such as the Sun, and produces its own food

• organism

• consumer

• producer

• prey

• predator

Tags

NGSS.MS-LS1-6

The largest number of individuals of one species that an ecosystem can support over time

• population

• food pyramid

• carrying capacity

• food web

• community

A model that shows the amount of energy available in each link of a food chain

• carrying capacity

• food chain

• food web

• energy pyramid

• ecosystem

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A model of energy transfer that can show how the food chains in a community are interconnected

• community

• food web

• energy pyramid

• carrying capacity

• biome

Tags

NGSS.MS-LS2-3

The student makes the claim that decreasing the size of forests will cause Earth to run out of oxygen. Does the student’s research support the concern?

• es. Plants and cyanobacteria are mostly found in forests and are harmed by its decreasing size.

• Yes. Farms and housing developments constructed in forests decrease nutrients available to freshwater and saltwater ecosystems

• No. Oxygen is evenly produced by three kingdoms of organisms, if the destruction of forests decreases the population of one kingdom, then other two will increase

• No. Most of Earth’s oxygen supply comes from saltwater organisms, and destruction of forests will have little effect on those organisms.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which can be inferred from the information in the diagram?

• Factories, plants, and animals all give off about the same amount of carbon dioxide to the atmosphere and absorb roughly equal amounts of oxygen.

• Factories take in as much carbon dioxide from the atmosphere as they release through combustion of fossil fuels and have no impact on the carbon cycle.

• Plants absorb more carbon dioxide from the atmosphere than they produce from cellular respiration and use less oxygen than they produce from photosynthesis.

• Animals produce more carbon dioxide during cellular respiration than the oxygen they absorb from the atmosphere and disrupt the carbon cycle.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which conclusion is supported by the model?

• Consumers take up matter from the environment and decomposers and transfer matter to other organisms.

• Producers take up energy from decomposers and transfer energy to other organisms.

• Producers take up energy from consumers and decomposers and transfer energy to the environment.

• Consumers take up matter from producers and transfer matter to decomposers.

Tags

NGSS.MS-LS2-3

A student claims that the source of energy in the ecosystem is plants. Which argument correctly evaluates the student’s claim?

• The student is correct because plants store energy in biotic components, which allows the energy to be transferred through the ecosystem.

• The student is correct because plants release heat energy to organisms that consume them, and the energy is transferred through the ecosystem.

• The student is incorrect because the Sun provides light energy to plants, which is stored in biotic components, and the energy can be transferred through the ecosystem.

• The student is incorrect because heat is lost by plants, sheep, and wolves as matter is transferred through the ecosystem.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which diagram correctly shows the flow of matter between abiotic and biotic factors in an ecosystem?

• A

• B

• C

• D

Tags

NGSS.MS-LS2-3