Erosion
What is erosion? pg 44
The process of wearing away parts of rock and soil by the action of wind, water and ice, and the transportation of the material to new locations
What is weathering? pg 44
A long, slow process that breaks rocks and minerals into small pieces.
Name a cause of erosion
Water, wind, extreme weather events
Name one cause of weathering.
Water, plant roots, wind, temperature and acid in rainwater.
What does erosion affect more: soil or rocks?
Soil
What does weathering affect more: soil or rocks?
Rocks
Name one way to prevent erosion.
Building barriers with rocks or wood, ice, plant roots
Name one way to prevent weathering
Wind barriers, filling in cracks in rocks, using salt to prevent from freezing
How can plants help prevent erosion?
Plant roots hold on to soil helping it from being taken away by erosion.
How does water cause weathering?
Water seeps into the cracks and then freezes. The ice expands, the cracks become bigger and over time the rock breaks off
How can ice help prevent erosion?
Ice freezes over the coastal landscape and then the waves crash on the ice wearing it down instead of the coastline
How can plants cause weathering?
Plant roots grow in the cracks of the rocks. As the roots grow larger they can cause pieces of the rocks to break off.
What is one way PEI is helping to prevent erosion?
Building barriers, discouraging people from building on the coast, intertidal reefs
How can temperature cause weathering?
The temperature can cause the rock to expand and contract which can cause the rocks to crack and pieces of the rocks to break off.
When the rock is colder is contracts and when it is warm is expands.