3rd Grade Soil and Erosion

What color is soil?

• Hot pink

• Navy blue

• many colors (red, brown, gray, yellow, black, etc.)

• Sparkly

Why is soil important for plant growth?

• It makes the Earth's surface hard

• It moves easily from one place to another

• It does not let plants grow roots too deeply

• It contains nutrients to help plants grow

What is weathering?

• Wearing down and breaking apart rocks

• Rain

• soil when it gets wet

• Erosion

What is erosion?

• When wind, water, and weather change a natural substance over time

• When water gets into soil

• When it hails

• Snow that turns black.

Which of these definitions correctly describes the meaning of erosion?

• the breaking of materials, such as rocks and soil 
• the movement of materials, such as rocks and soil
• the dropping off of rocks and soil in a new place
• huge sheets of moving ice

Which of these definitions correctly describes the meaning of weathering?

• the breaking of materials, such as rocks and soil 
• the movement of materials, such as rocks and soil
• the dropping off of rocks and soil in a new place
• huge sheets of moving ice

What three things cause most erosion?

• rain, snow, sleet
• weathering, erosion, deposition
• glaciers, moraines, valleys
• wind, ice, water

Any process that breaks down rocks

• erosion
• deposition
• weathering

This type of soil is made of larger pieces of rock and doesn't hold water well. 

• loam
• clay
• silt
• sand

This type of soil is usually red in color and is very sticky when it's wet. 

• sand
• clay
• silt
• loam