IMO Practice Test — Nature's Treasures
6 Questions • 15 min • Olympiad level
15:00
Question 1 of 6
A forest is usually called a renewable resource, but it can become non-renewable if it is:
Cut down faster than new trees can grow
Watered every day
Left undisturbed
Protected from fire
Explanation: If trees are removed faster than they regrow, even a forest can be used up.
Question 2 of 6
Why does using solar and wind power help reduce air pollution?
They make electricity without burning fuels
They use more coal
They produce more smoke
They need petrol
Explanation: Sun and wind generate power without burning fuels, so they cause little pollution.
Question 3 of 6
A family carries cloth bags, uses both sides of paper and refills bottles. They are mainly practising:
Reuse
Pollution
Mining
Winnowing
Explanation: Using things again instead of throwing them away is reuse.
Question 4 of 6
Only a small part of Earth's water can be used by us because most of it is:
Salty or frozen
In bottles
Made of minerals
In the air as oxygen
Explanation: Most water is salty sea water or frozen in ice, leaving little usable fresh water.
Question 5 of 6
Soil is treated as a precious resource partly because it:
Takes a very long time to form
Can be made in a factory quickly
Is useless to plants
Is a fossil fuel
Explanation: Soil forms extremely slowly over a long time, so it must be protected.
Question 6 of 6
The best overall reason to follow the three R's is to:
Make resources last longer and reduce waste and pollution
Use resources faster
Create more garbage
Cut down more forests
Explanation: Reduce, Reuse and Recycle conserve resources and cut waste and pollution.