Unit 3 Soil, Erosion, and Weathering Review

What is soil made up of?

• Rocks only

• Sand and clay only

• Rocks, minerals, water, and organic matter

• Air and dust

Which soil type holds the most water?

• Sand

• Clay

• Loam

• Gravel

What happens during erosion?

• Rocks are BROKEN DOWN into smaller pieces.

• Soil and rock are MOVED from one place to another.

• Soil is formed.

• A plant grows in the soil.

Which of the following is an example of weathering?

• Water breaking apart a rock into smaller pieces.

• A river carrying soil away.

• A plant's roots breaking through the sidewalk.

• A glacier scraping rocks away as it moves.

True or False: Wind, water, and ice can cause erosion by moving soil and rocks.

• True

• False

True or False: Weathering is the process of moving rocks and soil.

• True

• False

What is the difference between the texture of sand and clay?

• Clay feels gritty and sand feels smooth and sticky when wet.

• They have the same texture.

• Sand feels gritty and clay feels smooth and sticky when wet.

• Sand feels soft and clay feels gritty.

Which soil holds water the best for plants?

• Clay

• Gravel

• Sand

• Loam

What senses do you use to investigate texture?

• Smell

• Touch

• Sight

• Hearing

Which soil holds the least water?

• Sand and Gravel

• Clay

• Loam