Weathering

What type of weathering is it when acid rain breaks down and changes the rock.

• chemical weathering 
• physical or mechanical weathering
• erosion

What is sediment?

• a chemical reaction
• tiny pieces of weathered rock carried by wind or water
• pollution

Ice wedging will

• wear down rocks as they bounce together 
• break up rocks when the water in cracks freezes and thaws
• peel away loosend material from the surface of rocks. 

How do plants weather rocks?

• during photosynthesis
• when roots grow into cracks of rocks and expand the rock
• when the plant moves water from the roots to the leaves

The process that breaks down rocks and other materials on Earth's surface is called

• weathering
• erosion
• soil conservation
• decomposition

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.

All of the following are causes of physical weathering except...

• plant growth
• wind
• acid rain
• running water

Which of the following is an example of chemical weathering?

• Acid rain dissolving limestone
• roots breaking into concrete
• paper being ripped
• Water running over rocks

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

Weathering can change roads, sidewalks, buildings and sculptures over time.

• False
• True