Types of Weathering

•____________ Weathering only changes the shape.

•__________ Weathering changes the composition.

Types of Weathering

•Mechanical Weathering only changes the shape.

•__________ Weathering changes the composition.

Types of Weathering

•Mechanical Weathering only changes the shape.

•Chemical Weathering changes the composition.

Why do rocks weather?

•The conditions _________________ are different from the conditions in which __________.

•They are ____ exposed to the “elements”

Why do rocks weather?

•The conditions at the surface are different from the conditions in which __________.

•They are ____ exposed to the “elements”

Why do rocks weather?

•The conditions at the surface are different from the conditions in which it formed.

•They are ____ exposed to the “elements”

Why do rocks weather?

•The conditions at the surface are different from the conditions in which it formed.

•They are now exposed to the “elements”

What controls the weathering?

•___________________•_____________•__________

What controls the weathering?

•Mineral composition

•_____________•__________

What controls the weathering?

•Mineral composition

•Particle size•__________

What controls the weathering?

•Mineral composition

•Particle size•Climate

• Mechanical and Chemical Weathering work __________.

• More ____________ weathering is able to take place after ______________ weathering has.

• Mechanical and Chemical Weathering work together.

• More ____________ weathering is able to take place after ______________ weathering has.

• Mechanical and Chemical Weathering work together.

• More chemical weathering is able to take place after ______________ weathering has.

• Mechanical and Chemical Weathering work together.

• More chemical weathering is able to take place after mechanical weathering has.

• Ice or Frost Wedging – water takes up 10% more space when it ________ than when it is melted.

• Ice or Frost Wedging – water takes up 10% more space when it freezes than when it is melted.

•clay materials expand and contract when they are exposed to water or dry out

•wet – ______________•dry – _______________

•Forms ____________

•clay materials expand and contract when they are exposed to water or dry out

•wet – swelling•dry – _______________

•Forms ____________

•clay materials expand and contract when they are exposed to water or dry out

•wet – swelling•dry – shrinking

•Forms ____________

•clay materials expand and contract when they are exposed to water or dry out

•wet – swelling•dry – shrinking

•Forms Mud cracks

•rocks from the deep rise to surface and are exposed to less pressure – it peels in layers

PRESSURE and STRESS Within the

Mountain

• plants grow on rocks, roots go down into small cracks, then growing roots get bigger and _________________

• plants grow on rocks, roots go down into small cracks, then growing roots get bigger and break the rock