How much do you know about Earth? Test your knowledge by taking the Earth quiz. All you need to do is click on an answer for each question. Have fun!

1: What is Earth?
a) A dwarf planet
b) A planet
c) A moon

3: How long does it take Earth to rotate, or spin around, once?
a) About 24 hours
b) 7 days
c) About 12 hours

5: Which of these sentences is false?
a) Earth’s core is a ball of metal.
b) Beneath Earth’s crust is a layer of super-hot rock.
c) Beneath Earth’s crust is an underground sea.

7: Which of these statements is false?
a) Earth’s atmosphere contains oxygen.
b) Earth’s atmosphere does not contain oxygen.
c) Earth is the only planet where we know there is life.

9: What is Earth’s nearest neighbor in space called?
a) Neptune
b) The Moon
c) The Sun

11: How many types of different living things are there on Earth?
a) About 2 million
b) About 1,000
c) Over 8 million

13: Which statement is true?
a) The Moon is bigger than Earth.
b) Earth and the Moon are exactly the same size.
c) Earth is bigger than the Moon.

15: What is Earth’s nickname?
a) The dusty planet
b) The blue planet
c) The giant planet

17: Which four planets are closest to the Sun?
a) Mercury, Venus, Earth, Mars
b) Earth, Jupiter, Saturn, Uranus
c) Venus, Mars, Saturn, Neptune

19: Which statement is false?
a) Earth is one of eight planets in the solar system.
b) Earth orbits the Sun in the asteroid belt.
c) Earth is moving through space at over 66,000 miles per hour,
(107,000 km/h).

2: How long is a year on Earth?
a) 50 days
b) 1,000 days
c) 365 days

4: What is the outer layer of Earth like?
a) Covered with a thin, rocky crust
b) Covered with volcanoes and hot, melted rock
c) Covered with large oceans of liquid metal

6: Which statement is true?
a) Earth is the third planet from the Sun.
b) Earth is the fourth planet from the Sun.
c) Earth is the sixth planet from the Sun.

8: Where does Earth get its name from?
a) From the name of the Roman god of the sea
b) From a very old word for “ground”
c) From the name of the Greek goddess of love and beauty

10: How long is Earth’s journey around the Sun?
a) About 584 million miles (940 million km)
b) About 2 million miles (3 million km)
c) About 58 billion miles (93 billion km)

12: What color is the Moon when we see it in the sky?
a) Bright green
b) White or grayish-white
c) Pink

14: How wide is Earth across?
a) About 7,918 miles (12,742 km)
b) About 109 miles (175 km)
c) About 20,000 miles (32,187 km)

16: Which statement is true?
a) Earth’s surface is completely covered with water.
b) Three-quarters of Earth’s surface is covered with water.
c) There is hardly any water on Earth.

18: How far is Earth from the Sun?
a) Nearly 250,000 miles (400,000 km)
b) Over 100 trillion miles (160 trillion km)
c) About 93 million miles (150 million km)

20: Which statement is true?
a) When viewed from space, Earth looks like a blue, green,
and brown ball.
b) When viewed from space, Earth looks reddish, like Mars.
c) Earth looks all blue when viewed from space.

Click to download a pdf
version of these questions.