Ecosystem Processes and Interactions

What is a CYCLE?

• Natural events in an ecosystem

• A series of repeating steps in the environment.

• A biotic factor

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NGSS.MS-LS2-3

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Select ALL the following activities that add nitrogen to water in an ecosystem.

• Fertilizer from agriculture

• Plants doing photosynthesis

• Cars burning fossil fuels

• Sewage

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

Which of the following ponds would have the best water quality?

• Pond A

• Pond B

• Pond C

• Pond D

Tags

NGSS.MS-LS2-1

Which of the following ponds would have the WORST water quality?

• Pond A

• Pond B

• Pond C

• Pond D

Tags

NGSS.MS-LS2-1

Life science students set up an aquarium to test water quality. Each week they recorded data in the model ecosystem. One possible inference the students could make is________

• The pH of the water is neutral

• The water temperature dropped 1 degree

• Dissolved oxygen increased because plants were added

• Algae in the tank is a green color

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Do plants performing photosynthesis increase or decrease carbon in the carbon cycle?

• Increase

• Decrease

• No effect

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NGSS.MS-LS1-6

Why would dissolved oxygen be less in a lake during the summer than during the winter?

• There is less photosynthesis

• Hot water can hold more dissolved oxygen

• There are more bacteria

• Hot water can hold less dissolved oxygen

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NGSS.MS-LS1-6

Are oxygen, carbon, nitrogen, and pH BIOTIC or ABIOTIC?

• Biotic

• Abiotic

Planting more trees would decrease which gas in the atmosphere?

• Nitrogen

• Oxygen

• Carbon dioxide

• Water vapor

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which two statements describe the cycle below?

• Plants breathe in oxygen and breathe out carbon dioxide.

• Animals and plants breathe in oxygen and breathe out carbon dioxide.

• Plants breathe in carbon dioxide and breathe out oxygen

• Animals breathe in oxygen and breathe out carbon dioxide.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6