The Equator is an imaginary line around the middle of the Earth.

The Earth

The earth is one of the planets in our solar system. It is the third planet in distance from the sun and the fifth largest in diameter. The earth is the only known planet to support life. The earth has three main zones: the lithosphere, the hydrosphere and the atmosphere. The earth is almost spherical in shape, but due to small surface variations it is slightly pear-shaped. It takes the Earth 23.93 hours to rotate around its axis once - this is a called a sidereal day. Each year on Earth takes 365.26 Earth days (in other words, it takes the Earth 365.26 days to orbit the Sun once).

Questions About the Earth:

How Big is the Earth?
What is the Earth Made Of?
Why does the Earth Orbit the Sun?
How old is the Earth?
What is the Equator?
What are hemispheres?
Why do we have night and day?
What is the Earth's axis?

The Atmosphere & Weather

What is the atmosphere?
What is the ozone layer?

The Ocean

Why is the ocean salty?

Did you know?

71 percent of the Earth is covered by water.

The Earth is 93 million miles from the Sun.

There is a high and low tide because of our moon and the Sun.

The Earth is 235,000 miles from the Moon.

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