Soil Formation EC opp

What is soil a mix of?

• Organic and synthetic components

• Organic and inorganic components

• Biomass and sand

• Rock and minerals

What is the main organic part of soil?

• Silt

• Sand

• Humus

• Clay

Which nutrients are commonly found in soil?

• Carbon, hydrogen, oxygen

• Nitrogen, phosphorus, potassium

• Calcium, sulfur, helium

• Magnesium, zinc, cobalt

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is the top layer of soil called?

• A Horizon

• B Horizon

• O Horizon

• E Horizon

Which soil horizon is rich in humus?

• O Horizon

• A Horizon

• B Horizon

• C Horizon

What is the role of the E horizon?

• Zone of organic matter accumulation

• Zone of eluviation where materials are leached

• Zone of weathered bedrock

• Topsoil layer where plants grow

Tags

NGSS.MS-LS1-5

Which horizon is known as subsoil?

• A Horizon

• B Horizon

• C Horizon

• R Horizon

What is the main characteristic of the C horizon?

• High organic matter

• Weathered bedrock

• Rich in clay and minerals

• Zone of eluviation

Which horizon contains decomposing plant and animal matter?

• A Horizon

• E Horizon

• O Horizon

• R Horizon

Tags

NGSS.MS-LS2-3

What is the process of breaking down rocks into smaller pieces called?

• Erosion

• Weathering

• Sedimentation

• Deposition

Tags

NGSS.MS-ESS2-2