6th Grade Science Review- Shane

What kind of weathering causes the mineral composition of rocks to change?

• mechanical weathering

• permeable weathering

• chemical weathering

• general weathering

In which soil layer would you find loam that in humus?

• A horizon

• B horizon

• C horizon

• bedrock

The texture of particle size of soil determines

• soil fertility

• whether the soil is topsoil or subsoil

• how much air and water the soil can hold

• how much litter will form

Which layer of the soil profile contains a solid layer of rock

• horizon b

• horizon R (bedrock)

• horizon A

• horizon C

Soil is made of

• dead plants and animals

• air and water

• weathered rocks and minerals

• all of the above

Layers of soil are also known as

• soil profiles

• soil horizons

• soil sheets

• soil cores

What is the layer of soil just below the topsoil?

• terrace farming

• topsoil

• subsoil

• soil

What is the layer of soil that contains humus, leaf litter adn other organic matter

• Bedrock-Horizon R

• Topsoil-Horizon A

• Subsoil-Horizon B

• Organic - Horizon O

What layer is the bottom of the soil profile?

• topsoil

• bedrock

• separated rock

• partially weathered parent material

An animal that lives underground by making a hole and mixing up air, water and humus in the soil is called a

• decomposer

• burrower

• humus source