Exploring Rational Expressions: Addition and Subtraction

Where can you find the text about Earth's water sources?

• In the lock book on page 321

• In the key book on page 321

• In the lock book on page 123

• In the key book on page 123

What is the main idea of the global well concept?

• Water is not necessary for life

• Water is scarce and needs to be preserved

• All water on Earth comes from a single source

• Water is abundant in the universe

Which is the only planet known to support life due to its liquid water?

• Venus

• Jupiter

• Mars

• Earth

What percentage of Earth's surface is covered by water?

• About 70%

• About 80%

• About 60%

• About 50%

What is the primary source of drinking water?

• Groundwater

• Ice caps

• Rivers

• Oceans

Where does most of the Earth's fresh water come from?

• The atmosphere

• Underground aquifers

• Glaciers and ice caps

• Rivers and lakes

What process in the water cycle involves water rising into the air as vapor?

• Condensation

• Precipitation

• Collection

• Evaporation

What happens to water vapor as it rises?

• It disperses into the atmosphere

• It falls as rain immediately

• It condenses into droplets

• It turns into ice

How much does the average white cloud weigh compared to a blue whale?

• About the same

• About three times as much

• About half as much

• About twice as much

What does the water cycle help to explain?

• The disappearance of water on Earth

• The uneven distribution of water

• The creation of new water sources

• The continuous movement of water on Earth