Free GED Science Earth and Space Science Practice Test

Question 1

Which layer of the Earth is the thinnest?

Accepted Answer

Crust

Answer

Inner core

Answer

Outer core

Answer

Mantle

Question 2

What is the primary gas in Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Oxygen

Answer

Carbon dioxide

Answer

Argon

Question 3

Which type of rock forms when molten rock cools and solidifies?

Accepted Answer

Igneous

Answer

Sedimentary

Answer

Metamorphic

Answer

Organic

Question 4

What causes the seasons on Earth?

Accepted Answer

The tilt of Earth's axis as it orbits the Sun

Answer

Earth's distance from the Sun varies throughout the year

Answer

The rotation of Earth on its axis

Answer

The Moon's gravitational pull

Question 5

What is the name of the supercontinent that existed approximately 300 million years ago?

Accepted Answer

Pangaea

Answer

Gondwana

Answer

Laurasia

Answer

Rodinia

Question 6

Which of the following is the correct order of the planets from closest to farthest from the Sun?

Accepted Answer

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Answer

Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Answer

Mercury, Earth, Venus, Mars, Jupiter, Saturn, Uranus, Neptune

Answer

Mercury, Venus, Mars, Earth, Jupiter, Saturn, Uranus, Neptune

Question 7

What is the water cycle process where liquid water becomes water vapor?

Accepted Answer

Evaporation

Answer

Condensation

Answer

Precipitation

Answer

Transpiration

Question 8

A seismograph measures:

Accepted Answer

Earthquake intensity and seismic waves

Answer

Atmospheric pressure

Answer

Ocean current speeds

Answer

Wind velocity

Question 9

Which layer of the Sun produces the light and heat we receive on Earth?

Accepted Answer

The photosphere

Answer

The core

Answer

The radiation zone

Answer

The convection zone

Question 10

What is the primary cause of ocean tides on Earth?

Accepted Answer

The Moon's gravitational pull

Answer

Earth's rotation

Answer

Solar wind

Answer

Atmospheric pressure changes