Changes to the Ecosystem

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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An ______________ is a system made up of all the biotic and abiotic factors in an area and all the interactions among them.

• ecosystem

• habitat

• population

• community

Why would humans cut down forests?

• to build roads

• to build buildings

• to build factorys

• all of the above

Which of the following would have a negative impact on an ecosystem

• constructing highways
• planting trees
• recycling paper

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Which is NOT an example of a natural environmental change?

• a beaver dam
• a hurricane
• a volcanic eruption
• a housing development

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When the last member of a species dies, the species becomes

• extinct
• endangered
• threatened
• dead

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In a pond ecosystem, what would happen to frogs if the insect population decreased?

• There would be more frogs in the pond

• There would be more insects in the pond

• There would be less frogs in the pond

• More fish would move to the pond

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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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A squirrel makes a change to its environment when it —

• climbs a tree

• digs a hole to bury an acorn

• collects acorns

• jumps from tree to tree

Burning fossil fuels adds carbon dioxide to the air. What could be done to reduce the amount of carbon dioxide and increase the amount of oxygen in areas where fossil fuels are burned?

• Building houses

• Driving cars

• Planting trees

• Burning our trash

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