Unit 3 Energy Flow Exam

Grace and Noah are studying a pond ecosystem. Which organisms in the food web are both primary and secondary consumers?

• Cattails

• Bluegills

• Coyotes

• Snakes

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NGSS.MS-LS2-2

Arjun and Lily are studying a pond ecosystem. If the algae or cattails (producers) are removed in the food web, which of the following changes would most likely occur?

• The entire food web would collapse over time.

• The food web would depend on the decomposers for energy

• The consumers would begin making energy for the food web

• The populations of the remaining organisms in the food web would increase

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

During a prolonged drought in a region, the cattail (plant) population sizes decrease significantly. Which of the following statements describes how this decrease in the cattail population sizes affects other populations in the region?

• Omnivore population sizes increase, and herbivore population sizes increase

• Omnivore population sizes decrease, and carnivore population sizes increase

• Herbivore population sizes increase, and carnivore population sizes decrease

• Herbivore population sizes decrease, and carnivore population sizes decrease

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Coral reefs are under threat due to increased ocean acidity and rising water temperatures. Which of the following actions would most likely help in preserving coral reefs?

• implementing renewable energy sources

• increasing coal mining activities

• expanding the use of diesel engines

• constructing more offshore oil platforms

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NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Michael and Mia are studying the ecosystem of a local field. Which of the following conditions is most likely to lead to an increase in a field mouse population?

• the arrival of another herbivorous mammal

• the presence of a greater number of predator snakes

• the disappearance of a bird species that prey on the mouse

• the lack of adequate rainfall for plants in the mouse’s habitat

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Aiden is studying ecosystems that can survive without sunlight as an initial energy source. He learns that instead of photosynthesis, the autotrophs in these systems use a process called _______________________ in which they harness chemical energy released from sulfur vents under the ocean, rather than from the sun.

• Sulfursynthesis

• Hydrosynthesis

• Chemosynthesis

• Radiationsynthesis

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NGSS.HS-LS2-3

Match the letters and numbers in the components of the picture of the food chain below. C is

• Primary consumer

• Tertiary consumer

• Secondary consumer

• Quaternary consumer

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NGSS.MS-LS2-3

Match the letters and numbers in the components of the picture of the food chain below. E (2 possible answers) is

• Producer

• Autotroph

• Decomposer

• Omnivore

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NGSS.MS-LS2-3

Match the letters and numbers in the components of the picture of the food chain below. 2 is

• Herbivore

• Carnivore

• Decomposer

• Omnivore

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NGSS.MS-LS2-3

Match the letters and numbers in the components of the picture of the food chain below. 3 is

• Herbivore

• Carnivore

• Decomposer

• Omnivore

Tags

NGSS.MS-LS2-3