Planet Earth

Earth's atmosphere has more nitrogen than oxygen in it.

• True

• False

The sun remains directly overhead in areas outside the Tropics.

• True

• False

Movements of air are called winds.

• True

• False

Rain generally falls on the side of the mountain facing the ocean.

• True

• False

Earth has five basic climate zones.

• True

• False

What is the source of all energy on Earth?

• the wind

• the sun

• Earth's coal

• Earth's oxygen

What causes the seasons to change on Earth?

• the North and South Poles

• Earth's distance from the sun

• the wind currents

• the Earth's tilt as it revolves around the sun

How many layers make up the inside of Earth?

• 2

• 3

• 4

• 5

What is the correct term for Earth's completion of one full trip around the sun?

• orbit

• axis

• revolution

• circle

What term describes the increase in the average temperature of Earth's atmosphere?

• climate zones

• global change

• climate warming

• global warming