Soil Quiz

Soil is

• the bottom layer of the Earth

• the middle layer of the Earth

• the top layer of the Earth

• under the Earth

What is soil made of? Select ALL that apply.

• sand

• humus

• soda

• air

What is the process that forms soil?

• rain

• mud

• weathering

• the weather

What happens to rocks after being exposed to the Sun's heat?

• the rocks contract

• the rocks expand

• the rocks shrink

• nothing happens

What happens to rocks at night when it is cooler?

• the rocks freeze

• the rocks expand

• the rocks get bigger

• the rocks contract

What causes rocks to break into smaller pieces? Select ALL that apply.

• someone blowing on them

• the continuous expansion and contraction due to the presence of heat

• strong winds

• water

What is humus?

• a yummy dip

• decaying plants and animals

• a humorous book

• when birds hum

Which type of soil has medium sized particles?

• sand

• clay

• silt

• soil

Which type of soil has the largest rock particles?

• silt

• clay

• sand

• mountains

Which type of soil has the finest sized rock particles?

• sand

• silt

• clay

• mountains