Weathering
Published on Nov 05, 2015
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PRESENTATION OUTLINE
WHAT IS WEATHERING?
-THE BREAKING DOWN OF ROCKS, SOIL, AND MINERALS
TYPES OF WEATHERING
- Mechanical Weathering
- Chemical Weathering
- Biological Weathering
MECHAINICAL WEATHERING
- -the rocks are broken down into smaller pieces,
- BUT the chemical composition of the rock remains the same
- No new substances are produced
Photo by Justin in SD
EXAMPLE OF MECHANICAL WEATHERING
- Water sometimes gets into the tiny cracks in boulders
- If that water freezes, it expands, opening the crack even more and eventually splitting the rock
CHEMICAL
-WHEN ROCKS ARE BROKEN DOWN BY A CHEMICAL CHANGE
EXAMPLE OF CHEMICAL WEATHERING
- When underground rock decays as a result of chemical weathering
- It can cause the ground to collapse, creating a sinkhole
BIOLOGICAL WEATHERING
A FORM OF WEATHERING CAUSE BY GROWTH OF ROOTS AND BURROWING OF ANIMALS
EXAMPLE OF BIOLOGICAL
- Tree roots can grow into fractures in a rock and pry the rock apart
