IMO Practice Test — Earth & Space
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
A robot vehicle that explores a planet surface, like on Mars, is called a…
Rocket
Rover
Satellite
Telescope
Explanation: A rover drives across a planet to explore it.
Question 2 of 6
hard
A ball thrown on the Moon would travel farther than on Earth because the Moon has…
Weaker gravity
Stronger gravity
More air
No rocks
Explanation: Weaker Moon gravity lets the ball go farther.
Question 3 of 6
hard
Sailors of old used constellations and the Pole Star mainly to…
Find their direction at sea
Catch fish
Cook food
Make rain
Explanation: Star patterns helped sailors navigate.
Question 4 of 6
hard
Why does light from the Sun take about 8 minutes to reach Earth?
The Sun is very far away
Light is slow
Clouds block it
The Sun is small
Explanation: Even fast light takes 8 minutes across the great distance.
Question 5 of 6
hard
The Solar System is just a tiny part of a much larger group of billions of stars called a…
Country
Planet
Moon
Galaxy
Explanation: Our Solar System lies within the Milky Way galaxy.
Question 6 of 6
hard
A year on Mercury is much shorter than on Earth because Mercury…
Has a smaller, faster orbit around the Sun
Spins faster
Is bigger
Has no Sun
Explanation: Closer planets complete their orbit faster, so their year is shorter.