This study set covers Earth Science through 11 practice questions. Learn about Earth's unique characteristics, from its atmosphere and oceans to its orbit and composition. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 11 questions from the Earth: Our Home Planet study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the approximate length of a day on Earth?

A 23.9 hours
B 24.5 hours
C 23 hours
D 25 hours

2 How long does it take Earth to orbit the Sun?

A 365 days
B 365.25 days
C 360 days
D 370 days

3 What is the average distance from the Earth to the Sun?

A 93 million miles
B 100 million miles
C 80 million miles
D 90 million miles

4 Which of these is NOT a layer of the Earth?

A Crust
B Mantle
C Atmosphere
D Outer Core

5 What makes up most of Earth's atmosphere?

A Oxygen
B Carbon Dioxide
C Nitrogen
D Hydrogen

6 About what percentage of Earth's surface is covered by water?

A 50%
B 61%
C 71%
D 80%

7 What is the name of Earth's only moon?

A Luna
B Moon
C Titan
D Europa

8 Earth is the _____ planet from the sun.

A Second
B Third
C Fourth
D Fifth

9 What is the name of the force that formed the Earth?

A Friction
B Gravity
C Magnetism
D Wind

10 What protects Earth from harmful solar radiation?

A The crust
B The mantle
C The atmosphere
D The core

11 Earth is the only planet whose name doesn't come from:

A Old English
B Germanic
C Greek or Roman Mythology
D Latin

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