Soil Erosion

1.Which of the following best describes a rock?

• Solid and organic material

• Solid and inorganic material

• Solid and liquid organic material

• Liquid and inorganic material.

2. In your science activity, you observed that some rock samples are big while others are small. Your observation clearly shows that the rocks may differ in ______.

• Color

• Hardness

• Shape

• Size

3. In your science class, you were able to observe that rocks differ in size, color, shape, texture and hardness. This observation shows that rocks _______.

• Maybe soft or hard

• Maybe light or dark–colored

• Maybe big or small

• Have different characteristics

4. While doing the activity, you observed that some rocks can be scratched by other rocks. This shows that rocks differ in _____.

• Size

• Color

• Hardness

• Shape

5.Which of the following occurs when acidic water caused the rocks to break producing clay and soluble salts?

• Carbonation

• Oxidation

• Hydrolysis

• Erosion

6. Landslides on mountain slopes show the force of

• Gravity

• Runoff

• Wind

• Running water

The process that moves sediments

• Erosion

• Weathering

• Dissolution

• Fracture

8. All of these are causes of soil erosion except one.

• Water

• People

• Sun

9. Which of the following shows that soil erosion is caused by animals?

• Construction workers are building a housing project.

• Hen is digging the soil.

• Root of pants are growing.

10. When is wind an agent of soil erosion?

• When it breaks rocks into pieces

• When it blows rock pieces to other places

• When it stops picking up rocks

• When it presses down rocks