Weathering Erosion and Soil

What are the two factors that affect the rate at which weathering occurs?

• climate and mass of rock

• climate and size of rock

• type of rock and size of rock

• type of rock and climate

Which of the following is NOT a type of physical weathering?

• burrowing plants

• ice wedging

• plant roots

• acid rain

What is mechanical weathering?

• Process through which rocks are physically broken into smaller pieces.

• Rocks are broken down through chemical changes.

• Rocks are worn away from acid in plant roots.

• Rocks broken down by machinery.

Tags

NGSS.MS-ESS2-2

Carbon dioxide (CO2) combines with water as raindrops fall through the atmosphere. This makes a weak acid, called carbonic acid. Carbonic acid is a very common in nature, where it works to dissolve rock. Pollutants, such as sulfur and nitrogen from fossil fuel burning, create sulfuric and nitric acid. Sulfuric and nitric acids are the two main components of acid rain, which speeds up chemical weathering.
This statue was probably destroyed by _____.

• Wind

• Humans

• Acid Rain

• Animals

Tags

NGSS.MS-ESS2-2

Mechanical weathering increases the rate of chemical weathering. As rock breaks into smaller pieces, the surface area of the pieces increases Figure below. With more surfaces exposed, there are more surfaces on which chemical weathering can occur.
After hit with acid rain, tiny cracks form. Does this make it more likely or less likely to break apart?

• More Likely

• Less Likely

Tags

NGSS.MS-ESS2-2

Which of these is an example of erosion?

• Light shinning onto a mountain

• Rain breaking down rock

• Wind blowing away sediment

• All of the above

Tags

NGSS.MS-ESS2-2

How much time is taken to form 1 cm of soil?

• 10+ years

• 5 years

• 100s of year

• Few months

______ is one of the ways to prevent soil erosion.

• Trees cutting

• Clearing of forest for agriculture

• Contour ploughing

• Building dams

Which of the following is not a cause of soil erosion?

• Overgrazing

• Landslides

• Afforestation

• Rain wash

Water, wind, gravity, ice, plants are all part of this kind of weathering

• Chemical

• Mechanical