IMO Practice Test — Energy & Its Forms
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
LED bulbs are better than old bulbs because for the same light they use…
Less electricity
More electricity
More water
More fuel
Explanation: LEDs give the same light using less energy.
Question 2 of 6
hard
Wind and flowing river water can also make electricity. Their energy first came from the Sun, which causes…
Colours
Earthquakes
Winds and the water cycle
Rocks
Explanation: The Sun drives winds and the water cycle that we tap for power.
Question 3 of 6
hard
A stretched bow held by an archer stores energy that becomes energy of motion when the arrow is…
Painted
Released
Eaten
Cooled
Explanation: The stored energy in the bow launches the arrow.
Question 4 of 6
hard
Energy cannot be made from nothing or destroyed; it can only be…
Changed from one form to another
Painted
Eaten
Counted
Explanation: Energy only changes form — it is never created or destroyed.
Question 5 of 6
hard
In a solar lamp, the energy changes go: sunlight to electricity to…
Sound
Food
Light
Wind
Explanation: A solar lamp turns sunlight into electricity, then into light.
Question 6 of 6
hard
A cyclist pedalling a dynamo lights a lamp. The change is muscle energy to electricity to…
Rock
Food
Sound
Light
Explanation: A dynamo turns motion into electricity, then light.