Unit 9

Pollutants are things that cause

• pollution
• landfills
• flooding
• rainbows

When you visit natural habitats and help to keep them as they are, it is called

• vacation
• spring break
• agriculture
• ecotourism

An organism that breaks down the remains of dead organisms

• decomposer
• fish
• litter
• pollutant

When harmful materials are added to the environment

• landfill
• irrigation
• pollution
• recycle

A large outdoor place to bury wastes

• trash can
• park
• landfill
• farm

Harmful materials that get into the air, water, and land are called _______.

• endangered 
• nonrenewable resources 
• pollution 
• landfills

Which Louisiana species was once endangered, but has recovered?

• Louisiana black bear 
• American alligator
• red-cockaded wood pecker 
• passenger pigeon

What is one way that people can have a negative effect on the environment?

• breathing air 
• planting trees
• building houses
• recycling 

Which of the following is example of human activity that affects the environment in a positive way?

• creating pollution 
• creating landfills 
• cutting down trees
• preserving the land

An example of how humans can negatively impact the environment is by 

• reducing pollution 
• cleaning up litter
• recycling 
• polluting