Weathering and Soil

How does freezing water cause the weathering of rocks?  The freezing water—

• keeps the rocks in place
• makes the rocks last longer
• expands cracks and breaks rocks
• causes rocks to fall in landslides

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.

What is permeable?

• a material that is soft
• a material that is full of tiny air spaces that allow water to seep through it
• a material that is able to be broken and re-attached
• a material that is able to be created into a different substance

Which type of climate will have faster chemical weathering?

• Hot and Wet
• Cold and Dry
• Hot and Cold
• Cold and Wet

Farmers prefer to plant crops in soil that is rich in nutrients.  Which of these soil types would MOST LIKELY contain the most nutrients?

• soil that has many large rock particles in it
• soil that allows water to drain very easily
• soil with a bedrock very close to the surface
• soil with a lot of decomposed organic matter

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of the following is an example of mechanical weathering?

• Acidic groundwater dissolving limestone
• frost wedging
• Paper being burned
• Acid rain

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

Rust that forms on rocks or metal because of extended exposure to oxygen is what example of chemical weathering?

• carbon dioxide (carbonic acid)
• acid rain
• oxidation
• lichens

Tags

NGSS.MS-PS1-2

Roots grow into rocks and break them apart. This is what example of what kind of physical weathering?

• ice wedging
• abrasion
• plant roots
• animals

Soil formation begins with the weathering of 

• litter.
• bedrock.
• the A horizon.
• humus.

Tags

NGSS.MS-ESS2-2