Physical Weathering
What is physical weathering?
Physical (mechanical) weathering is the breakdown of rocks into smaller pieces.
What is erosion?
Erosion is the process by which wind, water, ice, or gravity transport weathered materials.
What is deposition?
Deposition occurs when the eroded materials are dropped, or laid down.
What is chemical weathering?
Chemical weathering is the breakdown of rocks into smaller pieces.
What type of weathering occurs when water enters cracks in rocks, freezes, and expands cracking rock?
Ice Wedging
How does water cause erosion?
Water erodes as it flows above ground.
How does water cause deposition?
If water is moving slowly enough, the sediment being carried may settle out, or stop.
What is acid precipitation?
Rain or other precipitation that is more acidic than normal,
What is the type of physical weathering that is the grinding away of rock by friction?
Abrasion
How does wind cause erosion?
True or False: Deltas are made because of deposition.
True
When a substance reacts and combines with oxygen causing it to rust.
How do plant roots growing inside a rock cause physical weathering?
Over time as the roots grow, they force the gaps wider, causing the rock to break apart.
How does ice cause erosion?
Give an example of deposition.
Sample answer: A glacier melts and the sediment it was carrying settles.
True or False: Chemical weathering changes the materials that are part of a rock into new materials?
True
How do animals cause weathering?
Animals that burrow can break down rocks as they dig.
How does gravity cause erosion?
Gravity causes weathered materials to fall down to the Earth's core or somewhere where it settles.
Deposition destroys matter. True/False
False
Chemical weathering causes rock to become weaker/stronger (pick one)
weaker