Mechanical and Chemical Weathering

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

• chemical weathering 
• physical or mechanical weathering
• erosion

Large amounts of soil have eroded from steep hill.  What is most likely to happen?

• an avalanche
• sinkhole
• landslide
• earthquake

Picture A is a mountain in the Sierra Nevada. Picture B shows only the west ridge of the mountain range.  What is the most likely reason for the shape of picture B?

• It was hit by a volcanoe
• Chemical weathering
• mechanical weathering
• it was caused by an earthquake

What is sediment?

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

What will cause a stream or river to carry the most sediment. 

• the slop of the stream
• the temperature of the water
• minerals in the water

What sequence of events will cause a large boulder to move down stream

• weathering-erosion-deposition
• erosion-deposition -weathering
• weathering-deposition-erosion

Acid rain is most likely to cause...

• deposition
• glaciers to move
• chemical weathering
• mechanical weathering

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

A group of geologist studied rocks and soil near a riverbank.  What will they most likely find?

• rocks not sowing any sign of change. 
• rocks being made smaller
• rocks becoming bigger
• rocks quickly being broke apart in the water