Transcript Mechanical Weathering

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