7.1 Earth's Spheres

Question 1

What are the names of the four spheres of Earth?

Answer 1

• Lithosphere
• Atmosphere
• Hydrosphere
• Biosphere

Question 2

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What is the biosphere?

Answer 2

Region of Earth where all life exists. Consists of all ecosystems (living organisms interacting with non-living components)

Includes all other spheres - organisms in soil, water, air.

Question 3

What is the hydrosphere?

Answer 3

All the water on Earth

Oceans, lakes, rivers, groundwater, ice, all forms of precipitation.

Question 4

What are the %’s in the hydrosphere?

Answer 4

• 97% saltwater
• 3% freshwater
• 1% unfrozen freshwater

Question 5

What is the lithosphere?

Answer 5

The earth’s solid crust and the cool part of the mantle right below the crust.

rocks, sand, minerarls, soil, mountains, continents, ocean floor, etc.

Question 6

What is the atmosphere?

Answer 6

All the air and gasses that surround the Earth