Earth's system

Identify the percent of Earth's surface that is covered in water.

• 1%

• 100%

• 50%

• 75%

Name the sphere that includes all solid, liquid, and gaseous water on Earth.

• geosphere

• hydropshere

• atmosphere

• biosphere

Name the thin layer of gas and dust that surrounds the Earth.

• hydrosphere

• geosphere

• biosphere

• atmosphere

Name the sphere that contains all the living organisms on Earth.

• geosphere

• hydrosphere

• biosphere

• atmosphere

The grass, the birds, and the deer are part of Earth's  _____

• atmosphere
• hydrosphere
• biosphere
• geosphere