Earth's Spheres Quiz

What layer of Earth's atmosphere is closest to the surface?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

Which sphere of the Earth consists of all the water on the planet?

• Atmosphere

• Geosphere

• Hydrosphere

• Biosphere

What is the main component of the geosphere?

• Water

• Rocks and minerals

• Air

• Plants and animals

Which sphere includes all living organisms on Earth?

• Atmosphere

• Hydrosphere

• Geosphere

• Biosphere

What process describes the movement of water from the Earth's surface to the atmosphere and back?

• Water cycle

• Photosynthesis

• Respiration

• Condensation

What percentage of the Earth's water is salt water?

• 3%

• 25%

• 71%

• 97%

Why is water conservation important?

• To ensure there is enough water for recreational purposes

• To maintain a healthy environment for all living things

• To make the water taste better

• To increase the amount of saltwater

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the primary function of the hydrosphere?

• To provide habitats for marine life

• To regulate Earth's temperature

• To support human life with fresh water

• All of the above

Which process in the water cycle involves water vapor cooling and changing into liquid water?

• Evaporation

• Condensation

• Precipitation

• Transpiration