Ecosystems Review

Which organism is a producer?

• algae

• fish

• seal

• shark

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NGSS.MS-LS2-3

Based on the food web, which animal gets most of its energy from grass?

• frog

• snake

• mouse

• rabbit

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NGSS.MS-LS2-3

The grassland biome is known as the breadbasket of the world.

What type of soil is most often found in the grasslands and increases plant production?

• clay soil

• rocky soil

• nutrient-rich soil

• nutrient-poor soil

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The nitrogen cycle is important to plants because

• nitrogen in the water is healthy

• plants cannot use nitrogen as it is

• plants need ammonia to photosynthesize

• most nitrogen comes from rocks in the soil

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A lack of rain limits the growth of vegetation in a grassland biome. How will the lack of rain affect the field mice in the biome?

• The population of field mice will increase.

• The population of mice will decrease.

• The population of mice will remain the same.

• The population of mice will increase and then decrease.

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What is an important abiotic factor in a marine ecosystem?

• the depth of the ocean

• the amount of plankton

• the size of marine animals

• the different kinds of algae

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NGSS.MS-ESS2-4

The grassland biome receives very little rain.

How will this most likely affect vegetation?

• The plants will grow to a greater height.

• The plants will have shallow roots.

• There will be many trees.

• There will be few trees.

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How would a lack of water in the area affect the food chain?

• The growth of grass will be limited, and the rabbit and fox populations would increase.

• The growth of the grass would be limited, and the rabbit and fox populations would decrease.

• The growth of the grass would be limited, but there would be no impact on the rabbit and fox populations.

• The growth of the grass would be limited, the rabbit population would decrease, and the fox population would increase.

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Why are certain types of vegetation more likely to be found near the surface of freshwater biomes?

• Sunlight may be unable to reach the lower layers of the water.

• The temperature of the water is lower near the surface of the water.

• The amount of dissolved oxygen is lower near the surface of the water.

• Fish that eat the plants are unable to swim to the lower layers of the water.

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When a plant dies, it often decomposes and becomes part of the soil. This process is one step in which cycle?

• lunar

• water

• carbon

• energy

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