Ecosystems and Changes

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

• constructing highways
• planting trees
• recycling paper

After this prairie was flooded, all the animals left and the grasses died. Which organism will most likely return first?

• jackrabbit

• hawk

• coyote

• grasses

Which organisms are least likely to perish if this grassland is flooded?

• butterfly and jackrabbit

• hawk and butterfly

• coyote and jackrabbit

• coyote and hawk

Which change would most likely cause all living things in an ecosystem to perish or move away?

• a flood on the plains

• fire in a forest

• a tornado on the plains

• a landslide down a mountain

What would happen to this food chain if there was no grass?

• The grasshoppers would eat the mice, and the snakes would move away.

• The mice would have more grasshoppers to eat.

• The snake population would increase.

• The grasshopper population would decrease.

What might happen to the rest of the food chain if there was an increase in the grasshopper population?

• The mouse population will decrease.

• The snake population will decrease.

• The hawk population will decrease.

• The grass population will decrease.

An ecosystem is made up of ____________.

• living things

• non-living things

• living and non-living things

A forest is an ecosystem.

• True

• False

Drought is caused by ___________.

• too much rain

• humans

• too little rain

The hardened remains of a living thing that died long ago.

• fossil

• extinct

• endangered

• minerals