7th Grade Unit 8 Review

What do the arrows represent on a food chain or food web?

• The order of size of organisms in the ecosystem

• The direction of energy flow through organisms

• The energy increases as you move from left to right

• The importance of organisms in the chain

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the function of skin, hair and nails?

• Protects the body from germs

• Provides a way for carbon dioxide to leave the body

• Allows the body to match the temperature of the environment

• All the above

Which of the following statements best describes the flow of energy in the energy pyramid?

• There is no energy above the level of producers in the system.

• Each group receives only a small amount of the energy from the level below it

• There is less energy in a producer level than a consumer level.

• As you go higher in the pyramid, the amount of energy increases.

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NGSS.MS-LS2-3

Which of the following represents the correct order for the levels of organization of plants and animals?

• cell → organ → tissue → organism → organ system

• cell → tissue → organism → tissue → organ system

• cell → tissue → organ → organ system → organism

• cell → organ system → organ → tissue → organism

How will a large decrease in the number of rats impact the food web?

• There will be a decrease in the number of cacti and sagebrush plants.

• There will be a decrease in the number of snakes, coyotes, and hawks.

• There will be an increase in the number of ants, tarantulas, and snakes.

• There will be an increase in the number of snakes, coyotes, and hawks.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What would be the result if the population of wild cats increased in this forest ecosystem?

• the population of rabbits and mice will decrease

• the population of goats and rabbits will increase

• the population of owls and snakes will increase

• The population of lions and jackals will decrease

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the following is the best explanation for how the element carbon first enters the food chain?

• Decomposers break down organic matter, releasing carbon into the soil

• Herbivores eat carbon containing plants

• Consumers undergo respiration which sends carbon into the atmosphere

• Producers absorb carbon from the atmosphere to use as an ingredient for photosynthesis

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

As a plant goes through the process of photosynthesis-

• radiant energy is converted into chemical energy

• radiant energy is changed into potential energy

• thermal energy is exchanged for kinetic energy

• heat energy is transferred into potential energy

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is an example of a physical change?

• pouring hydrogen peroxide (H₂O₂) on a cut, causing oxygen (O₂) bubbles to form

• mixing together flour, sugar, salt, eggs and butter to make cookies

• baking a birthday for your best friend

• enzymes within the digestive system breaking down the lunch you just ate

Which example below illustrates photosynthesis, which is the conversion of light energy to chemical energy. Which of these changes light energy to chemical energy?

• the battery of a flashlight

• the screen of a computer

• the leaf of a plant

• the bulb of a lamp

Tags

NGSS.MS-LS1-6