3.10B Soil Formation

The breaking down of rocks into smaller pieces is called—

• decomposition.
• remains.
• weathering.
• humus.

Tags

NGSS.MS-ESS2-2

Which part of the soil is a mixture composed of decaying organisms?

• Sand
• Silt
• Clay
• Humus

Clay, sand, silt, and gravel particles are different sizes. Which type of soil particle is the smallest?

• Clay
• Sand
• Silt
• Gravel

Which 2 processes are necessary for soil to form? Choose TWO answers.

• Evaporation
• Weathering
• Decomposition
• Condensation
• Heating

Tags

NGSS.MS-LS2-3

Which is NOT one of the parts that are in soil?

• water and air

• broken-down rocks and minerals

• dead plant material

• slime

Observe the soil sample. Rocks and other materials were gradually changed to form the soil What is one process that helped form the soil?

• Melted rock cooled and hardened to form the soil particles.

• Melted rock mixed with rocks that was weathered by rain form the soil.

• The remains of plants and animals mixed into the sediment to help form the soil.

• Heat from the Sun melted the rocks and they mixed to form the soil.

Tags

NGSS.MS-ESS2-1

What nonliving things can you find in the soil?

• Worms

• Bugs

• Rocks

• Plants

Tags

NGSS.MS-LS2-3

What do most plants need to grow?

• Soil

• Sunlight

• Water

• all the above

Tags

NGSS.MS-LS2-1

What is the top layer of soil called?

• Topsoil

• Subsoil

• Bedrock

• Humus

Rocks can be broken down by wind, water, and _____.

• flowers

• birds

• ice

• animals

Tags

NGSS.MS-ESS2-2