Ecosystem Interactions

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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What non-living factor is the most important for an ecosystem to work?

• Rock

• Sun

• Plants

• Animals

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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 term best describes two predators living in the same habitat who feed on the same prey?

• coexistence
• competition
• mutualism

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The Texas Kangaroo Rat, native to north-central Texas, makes its home in mesquite bushes.  If the mesquite bushes are cleared for human homes , which of the following is the most probable result?

• The rat population will rise (increase).
• The rat population will decline (decrease).
• The rat population will stay the same.
• The rat population will double.

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NGSS.MS-LS2-1

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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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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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Living and nonliving things interacting in an environment is called:

• Organism

• Producer

• Consumer

• Ecosystem

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