Soil

Soil is made of ---

• weathered rocks and minerals.

• dead plants and animals.

• air and water.

• all of the above

Tags

NGSS.MS-ESS2-2

Humus is ---

• the dead parts of plants and animals in soil.

• A food we eat with pretzels.

• The tiny particles inside of soil.

• The roots that come off of a plant and live in soil.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand

• silt

• clay

• humus

Tags

NGSS.MS-LS2-3

Why is topsoil darker than all other levels of soil?

• It contains all the darker colored minerals.

• It contains volcanic rock.

• It contains more organic matter.

• It contains bits of burned trees.

Tags

NGSS.MS-LS2-3

Why is soil an important natural resource?

• soil is used to make buildings

• soil can grow crops

• soil comes from bedrock

• soil is full of microbes

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What are the four soil components?

• Sand, rock, humus, air
• Rock, humus, air, water
• Rock, humus, roots, water
• Rock, humus, animals, plants

Tags

NGSS.MS-LS2-3

Topsoil is dark in color because it...

• undergoes a lot of chemical weathering.

• has a large amount of organic material.

• is full of dark rocks.

• contains a lot of worms.

Soil that is made up of about equal parts of clay, sand, and silt

• organic material

• loam

• humus

• top soil

weathering processes that cause exposed rock to undergo chemical decomposition, changing the chemical and mineralogical composition of the rock ~ Oxygen and acids are agents in chemical weathering

• ice wedging

• abrasion

• chemical weathering

• depositon

The process of weathering by which frost action, salt-crystal growth, absorption of water, and other physical processes break down a rock to fragments, involving no chemical change

• weathering

• ice wedging

• chemical weathering

• mechanical weathering