Water

What is the chemical formula for water?

• H2O

• HO2

• H2

• O2H

What is the process of water changing from a liquid to a gas called?

• Condensation

• Evaporation

• Sublimation

• Freezing

What percentage of the Earth's surface is covered in water?

• 50%

• 85%

• 30%

• 71%

What is the freezing point of water in Celsius?

• 50 degrees

• 0 degrees

• 100 degrees

• -10 degrees

Name the process by which plants release water vapor into the air.

• Transpiration

• Precipitation

• Condensation

• Evaporation

What is the term for the continuous movement of water on, above, and below the surface of the Earth?

• Water Cycle

• Hydrological Cycle

• Liquid Flow

• Aqua Movement

What is the main source of drinking water for most people?

• Bottled water from natural springs

• Rainwater collected in barrels

• Water from private wells

• Tap water provided by municipal water systems

What is the name of the largest ocean on Earth?

• Pacific Ocean

• Arctic Ocean

• Indian Ocean

• Atlantic Ocean

What is the term for water that falls from the atmosphere to the Earth's surface?

• waterfall

• dewdrop

• rainfall

• precipitation

What is the process of removing salt and other impurities from water to make it suitable for drinking called?

• Desalination

• Purification

• Clarification

• Decontamination