Ecosystem Interactions

Which example shows a relationship between a living thing and a non-living thing?

• An insect is food for salmon.
• Water carries a rock downstream.
• A tree gets nutrients from the soil.
• A flower makes food for a butterfly.

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NGSS.MS-LS2-3

Mushrooms are helping to break down the remains of a rotting log in the forest. how do the actions of the mushrooms benefit the other plants in the area?

• By returning nutrients to the soil.
• By releasing oxygen into the air.
• By making space for new animals.
• By decreasing the population of herbivores.

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Mud wallows in Africa are very important to animals. In fact, animals will sometimes fight over these mud wallows. Mud wallows are important to animals in areas of Africa that are hot and dry. Why are mud wallows so important to animals in Africa?

• They give them a place for shelter.
• They give them a place to interact with other animals.
• They give them a place to stay warm and to get energy from the Sun.
• They give them a place to stay cool and get out of the Sun. 

Plants interact with living and nonliving components in their environment. Which of the following is an interaction between the plant and a nonliving element?

• Small insects eating the stems of the plants

• Humans breathing oxygen released by plants

• Bees gathering pollen from flowers of plants

• Sandy soil holding the roots of the plants

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NGSS.MS-LS2-3

Which of these is an example of one living thing depending on another living thing?

• Cat walking on the sand

• Bird building a nest in a tree

• Dog warming in the sunlight

• Squirrel drinking water

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Another word for a living thing is a:

• animal

• organism

• plant

• community

If the population of prey increases, the population of predators will ________because of the availability of food.

• decrease
• stay the same
• increase

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NGSS.MS-LS2-3

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Which example shows a relationship between a living thing and a non-living thing?

• An insect is food for salmon.
• Water carries a rock downstream.
• A tree gets nutrients from the soil.
• A flower makes food for a butterfly.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

A group of one type of organisms is called a(n) ___________.

• Organism
• Population
• Community
• Ecosystem

Which of the following is an example of an abiotic factor?

• Flowers
• Sunlight
• Animal scat
• Insects

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NGSS.MS-LS2-3