Online Test — Rocks & Soil
10 Questions • 12 min • Chapter MCQ
12:00
Question 1 of 10
medium
We can protect soil by planting…
Metal sheets
Plastic
Glass
Trees and grass
Explanation: Plant roots hold soil in place and protect it.
Question 2 of 10
easy
Soil is made when big rocks slowly break into…
Bigger rocks
Tiny pieces
Water
Air
Explanation: Rocks break into tiny pieces that form soil.
Question 3 of 10
medium
The middle layer with bigger bits of rock is the…
Topsoil
Subsoil
Sky
Cloud
Explanation: Subsoil lies below the topsoil and has more rock.
Question 4 of 10
easy
Most plant roots grow in the…
Clouds
Solid bedrock
Topsoil
Air
Explanation: Roots grow mostly in the rich topsoil.
Question 5 of 10
hard
Why is soil important on top of the hard rock?
It is shiny
Plants can grow in soft soil
It is heavy
It blocks the Sun
Explanation: Plants need soft soil to take root and grow.
Question 6 of 10
easy
Rotting leaves and dead plants in soil are called…
Plastic
Glass
Metal
Humus
Explanation: Humus is the dark rotted plant matter in soil.
Question 7 of 10
easy
Soil also holds ___ that plants drink.
Metal
Glass
Water
Smoke
Explanation: Soil holds water for plant roots.
Question 8 of 10
medium
Rocks can be…
Big boulders or tiny pebbles
Only huge
Only tiny
Always soft
Explanation: Rocks range from big boulders to small pebbles.
Question 9 of 10
medium
Granite is a very ___ rock used to build floors.
Hard
Soft
Wet
Light
Explanation: Granite is a hard, strong rock.
Question 10 of 10
easy
Which rock is hard, shiny and used in fine buildings?
Chalk
Marble
Mud
Sand
Explanation: Marble is a hard, shiny building rock.