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

• constructing highways
• planting trees
• recycling paper

A habitat is the place where an animal lives. Which animal's habitat is probably not in the desert?

• an insect
• lizard
• desert rat
• bear

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

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

6. 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

What do scientist call organisms that are not native to an ecosystem and cause harm to native organisms?

• native plants
• invaders
• invasive species
• natural species

Which of the following activities has a positive effect on the environment?

• recycling
• deforestation
• pollution

When a certain population becomes so dense that it harms or changes the quality of life in that environment, we have...

• a population
• overpopulation
• pollution

A ______________ is the place where an organism lives.

• adaptation
• equilibrium
• population
• habitat

_____________ are geographical areas that contain different organisms suited for that environment.

• ecosystem
• habitat
• population
• biomes

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
• biodiversity