"What is it"
This agent contains sand that causes rock to breakdown.
The wind
What happens when water gets into the cracks of rocks? (hint: 2 things)
It freezes and expand
What is the breaking down of rocks?
Weathering
Slow
Large masses of rock that slide down a hill is the result of what?
What is Gravity
The Earth's surface is exposed to _______ & _______.
(hint: "w" words)
Water & Wind
What happens when moving water carries bits of sand and rocks down stream?
The pieces chip away at other rocks.
What is Erosion?
This can also cause erosion in the form of landslides.
Gravity
What are the 3 physical weathering types?
Ice wedging, Salt wedging, Root wedging
Earth's surface is also exposed to _____ & _________.
(hint: cold, has roots)
ice & growing plants
What can happen to the minerals that make up rocks if water gets inside?
The minerals can dissolve.
What are roots?
Roots are apart of growing plants
Moves
Landslides can be triggered by an __________ or other natural causes.
What is an Earthquake
What rushes down stream causing pieces surrounding land to break off & move down stream? (hint: 2 things)
Water and bits of rocks
What happens when minerals in rocks dissolve at many speeds or rates?
Caverns form
How do roots cause Erosion?
Roots spread inside the cracks and causes the rocks to break apart.
The Earth's surface changes are so slow that they are barely _____________.
Noticed/noticeable
What is larger rocks being broken down into smaller rocks by mechanical processes.
What is Physical Weathering
This is in the wind and scrapes against rocks & wears it away.
sand
This agent causes rocks to break into pieces after it gets into the cracks of rock.
Expanding water
What 3 agents cause Erosion to happen?
Water, wind, & ice
How long did it take the Colorado River to carve the Grand Canyon?
6 million years
This is the breaking down of rocks and minerals by wind, rain, snow, growing plants and burrowing animals.
What is weathering