Ecosystem Interactions

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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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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All of the following are examples of living things interacting with each other EXCEPT —

• birds preying on insects living in the grass

• squirrels spreading the seeds of trees by burying them

• frogs sleeping in the mud at the bottom of the pond

• fish eating plants and other smaller fish

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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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How does a bird "change its environment" to meet its NEEDS?

• builds a nest
• flies around
• catches bugs
• looks for something to eat

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A meadow has too many rabbits. What would help balance this ecosystem?

• more rain that grass needs
• more foxes that eat rabbits
• fewer foxes that eat rabbits
• more grass for the rabbits to eat

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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.

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

• Organism
• Population
• Community
• Ecosystem

An individual living thing is a(n) ___________.

• Organism
• Population
• Community
• Ecosystem