soil layers retest

What is soil made from?

• Water and air

• Rocks and minerals

• Plastic and metal

• Glass and rubber

Which layer of soil is on the top?

• Bedrock

• Subsoil

• Topsoil

• Sand

What is found in the subsoil layer?

• Lots of plants

• Mostly rocks

• Worms and insects

• Sand and shells

Which layer of soil is rich in nutrients?

• Bedrock

• Subsoil

• Topsoil

• Sand

What helps to break down rocks into soil?

• Wind and water

• Fire and smoke

• Plastic and metal

• Glass and rubber

What is the bottom layer of soil called?

• Topsoil

• Subsoil

• Bedrock

• Clay

Which layer of soil is usually darker in color?

• Bedrock

• Subsoil

• Topsoil

• Sand

Label the 5 layers of soil in the correct order.

b

c

d

e

a

Topsoil/A horizon

Bedrock/ R horizon

Subsoil/B horizon

Parent Rock/ C horizon

Humus/ O horizon

What is the layer of soil just below the topsoil?

• bedrock

• subsoil

• topsoil

• humus

Isabella planned to make a garden in her back yard, so she dug up the area and added fresh topsoil. As she worked, she thought about topsoil. She knew from her reading it had started as something else. Place the words from the word bank in boxes to show the correct way topsoil is formed. Drag and drop the word that describes the start of soil formation in the first box and the word that describes the final stage in the last box.

Groups:

(a) Bedrock

,

(b) Weathering

,

(c) Topsoil

,

(d) Decomposition

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