Planet Earth Self Check Quiz

What causes planets to orbit around the sun?

• sun flares

• the Earth's gravity

• the sun's gravity

• the Earth's axis

How far away is Earth from the sun?

• 93 million miles

• 365 million miles

• 24.5 light years

• 150 million miles

What is the name of the imaginary line that runs through Earth's center from the North Pole to the South Pole?

• longitude

• axis

• Prime Meridian

• Equator

The Earth _____ around the sun.

• tilts

• rotates

• spins on its axis

• revolves

Which of the following is known as the center of the Earth?

• the core

• the mantle

• the crust

• the biosphere

What is magma?

• Earth's mantle

• Earth's outer layer

• melted rock

• underwater volcanoes

About how much of the Earth's surface is covered by water?

• 30%

• 70%

• 2%

• 21%

June 21 in the Northern Hemisphere is known as the _____.

• summer solstice

• winter solstice

• fall equinox

• spring equinox

What causes the Tropics to experience hot, sunny weather most of the year?

• the Earth's gravity

• direct sunlight

• elevation

• ocean currents

The average weather conditions in a region over a long period of time is called _____.

• the rain shadow effect

• elevation

• precipitation

• climate