IMO Practice Test — Kinds of Plants
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
What is the main way we tell trees, shrubs and herbs apart?
The day they grow
Their colour only
Their smell only
Their size and how woody the stem is
Explanation: We sort them by size and stem type.
Question 2 of 6
hard
A pea plant climbs using tiny curling threads called…
Petals
Roots
Tendrils
Trunks
Explanation: Tendrils help climbers hold on and rise.
Question 3 of 6
hard
A potted plant's leaves are turning yellow and drooping. It most likely needs…
More darkness
Water and sunlight
Less air
A bigger pot only
Explanation: Yellow, drooping leaves often mean it needs water and light.
Question 4 of 6
medium
How do plants help keep our air clean?
They make smoke
They take in bad air and give out oxygen
They eat dust only
They do nothing
Explanation: Plants take in carbon dioxide and give out oxygen.
Question 5 of 6
medium
Why does a climber need a stick or wall?
To hide
It likes the colour
Its weak stem needs support to rise up
It does not need one
Explanation: A climber's weak stem needs support to climb.
Question 6 of 6
medium
Which list goes from SMALLEST to BIGGEST?
Rose shrub, mint herb, mango tree
Mango tree, rose shrub, mint herb
Mint herb, rose shrub, mango tree
Mango tree, mint herb, rose shrub
Explanation: Herb is smallest, shrub is medium, tree is biggest.