Ecosystems Unit 4 Test

1. These organisms gets their energy from the sun through the process of photosynthesis.

• Consumers
• Decomposers
• Producers
• Heterotrophs

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NGSS.MS-LS1-6

2.These organisms breaks down the cells of dead animals and plants into simpler substance and releases them back into the soil.

• Consumers
• Decomposers
• Producers
• Heterotrophs

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NGSS.MS-LS2-3

3. A relationship between individuals from two different species that benefits both individual species.

• Mutualism
• Commensalism
• Parasitism

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4. This is where a group of living and nonliving things interact with each other.

• Community
• Consumer
• Population
• Ecosystem

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NGSS.MS-LS2-3

5. Name the tertiary consumer in the food chain.

• lettuce
• greenfly
• ladybird
• thrush
• cat

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NGSS.MS-LS2-3

6. Which one would be a primary consumer?

• Tree
• Grasshopper
• Snake
• Hawk

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NGSS.MS-LS2-2

7. Select all the biotic factors below?

• Clouds
• Trees
• Birds
• Humans

8. This energy pyramid shows the flow of energy in an aquatic food chain. Choose the statement that correctly describes the flow of energy in this diagram.

• Consumers in the pyramid transfer their energy back to the sun after they die.
• Plants at the bottom of the pyramid get their energy from the soil they grow in.
• As you move up the pyramid, there is less energy at each level.
• Each level of consumer needs to make up for the decrease in energy by absorbing energy from the sun

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NGSS.MS-LS2-3

9. Why are there usually just a few organisms at the top of an energy pyramid?

• Organisms at the top are larger and require more living space.
• So much energy is lost from one level to the next that the energy available can only support a few.
• Humans hunt organisms at this level
• Decomposers have a bigger impact on the highest energy level.

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NGSS.MS-LS2-3

10. Which organisms in the food web are competing for the same resource?

• Shrew, snake, and the mountain lion
• Shrew, rabbit, and the mountain lion
• Snake, grasshopper, and the tree
• Grasshopper, rabbit, and the deer

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NGSS.MS-LS2-1