Water, Carbon, and Nitrogen Cycles

What is it called when plants give off water vapor?

• condensation
• evaporation
• sublimation
• transpiration

What source of energy evaporates the most water from Earth’s surface?

• volcanoes
• the sun
• lightning
• wind

What is water doing when it is changed to water vapor?

• evaporating
• condensing
• precipitating
• runoff

What is water vapor doing when it changes to water?

• evaporating
• condensing
• precipitating
• runoff

What is the process of water droplets or ice crystals falling from the sky?

• evaporating
• condensing
• precipitating
• runoff

What is water that flows in rivers and streams into the oceans and lakes?

• evaporating
• condensing
• precipitating
• runoff

Where does condensation occur in the water cycle?

• clouds forming
• ocean water changing to water vapor
• water flowing down a river
• underground water soaking into soil

How can water vapor in the air return to Earth?

• evaporates and blown by the wind
• evaporates and forms clouds
• condenses then precipitates

What are all living things made of?

• Soil
• Oxygen
• Carbon
• water

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death