4. How Soil Forms 2

Soil is formed when rock is broken down by ___________ and __________ with other materials.

• Weathering, breaks

• Erosion, breaks

• Weathering, mixes

• Erosion, mixes

Soil layers are also called ___________________.

• Soil boundary

• Soil border

• Soil horizon

• Soil line

The Bedrock (Horizon D) is made from igneous and metamorphic rocks.

• True

• False

Parent Rock (C Horizon) is made from bedrock being chemically and mechanically weathered.

• True

• False

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

Topsoil (A Horizon) is made from rainwater washing down the materials from Subsoil (B Horizon)

• True

• False

Tags

NGSS.MS-ESS2-1

Topsoil (A Horizon) is rich in _____________________.

• Clay, humus, minerals

• Clay, soil, minerals

• Clay, rocks, soil

• Clay, humus, soil

Topsoil (A Horizon) is made when __________ add humus to the soil, and plant _________ weather pieces of rock.

• Animals, leaves

• Plants, leaves

• Animals, roots

• Plants, roots

Which one is a decomposer?

• Mouse

• Mushroom

• Dead Leaves

• Owl

Which one is a burrower?

• Mouse

• Mushroom

• Dead Leaves

• Owl