IMO Practice Test — Earth & Space
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
Our Sun is just an average star but looks far brighter than other stars because it is…
A planet
Bigger than all stars
Hotter than all stars
Much closer to us
Explanation: The Sun looks bright mainly because it is the nearest star.
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
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 4 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 5 of 6
medium
Why is Venus hotter than Mercury even though it is farther from the Sun?
It is made of fire
It is closer to Earth
It has no Sun
Its thick clouds trap heat
Explanation: Venus's thick atmosphere traps heat like a blanket.
Question 6 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.