Four Domains of the Earth

The hydrosphere is made up of

• Air

• Water

• Gas

• Nature

The gaseous layers that surround the earth, is

• Lithosphere

• Hydrosphere

• Atmosphere

• Biosphere

Which is the blue planet?

• Mars

• Earth

• Jupiter

• Saturn

The thinnest layer of the Earth is the ___________.

• mantle
• crust
• core

Why is the inner core solid?

• its unknown
• what it's made of
• the pressure
• it is colder than the outer core

What is the correct order (starting from the surface) of Earth's layers?

• crust, outer core, inner core, mantle
• mantle, outer core, inner core, crust
• crust, mantle, outer core, inner core
• outer core, inner core, crust, mantle

Choose the picture that best represents the "biosphere".

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There is ______ of oxygen in the Atmosphere.

• 78%

• 21%

• 1%

• 0.9%

Earth is mostly covered by

• Land

• Water

• Air

• Animals

Where is most of the Earth's freshwater located?

• in aquifers

• in rivers and streams

• in the ocean

• in icecaps and glaciers