The Earth II

It takes _______ and six hours for the Earth to complete one full revolution around the Sun

...is an imaginary line that divides the Earth into the Northern Hemisphere and the Southern Hemisphere.

• The Equator

• An axis

The seasons are:

• summer

• spring

• winter

• autumm

The first day of summer and winter is called...

The first day of spring and autumn is called an...

There are four spheres:

• Atmosphere

• biosphere

• hydrosphere

• geosphere

The Earth's layers:

• mantle, core

• mantle, core and crust

• core and crust