Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
People who obtain their water from wells for water are using ________. |
groundwater |
|
|
Trees grown on tree farms are an example of a _________. |
renewable resource |
|
|
A resource that cannot be replaced after it is used up is called _________. |
nonrenewable resource |
|
|
In the United States, about half of the ________ comes from the cars people drive. |
air pollution |
|
|
Because the smoke from a forest fire is an unwanted substance that is added to the air, it is called a ________. |
pollutant |
|
|
A fuel formed over many years from the remains of living organisms is called a ________. |
fossil fuel |
|
|
A molecule of oxygen with three atoms of oxygen is called ________. |
ozone |
|
|
Rain containing acids formed from air pollutants is called ________. |
acid rain |
|
|
A colorless, odorless pollutant called ________ is poisonous to breath. |
carbon monoxide |
|
|
Why is coal classified as a nonrenewable resources? |
Coal is classified as a nonrenewable resource because it takes millions of years to be made again. |
|
|
Why is air pollution worse than it was 500 years ago? |
Air pollution is worse than it was 500 years ago because many years ago people didn't drive cars. Cars and smokey factories only developed over the last 120 years. |
