Destructive Forces
How is our Earth’s surface worn down?
What is a destructive
force?
Weathering
Weathering is a _______________ force.
There are two types of weathering: _________ & _________.
Weathering
Weathering is a destructive force.
There are two types of weathering: _________ & _________.
Weathering
Weathering is a destructive force.
There are two types of weathering: mechanical & chemical.
Weathering
______________weathering is the slow breaking apart or wearing away
of rock into smaller pieces.
These smaller pieces are known as ______________.
Weathering can be caused by ___________, ________ & __________.
Weathering
Mechanical weathering is the slow breaking apart or wearing away of rock
into smaller pieces.
These smaller pieces are known as _________________.
Weathering can be caused by __________, _________ & _________.
Weathering
Mechanical weathering is the slow breaking apart or wearing away of rock
into smaller pieces.
These smaller pieces are known as sediment.
Weathering can be caused by __________, _________ & _________.
Weathering
Mechanical weathering is the slow breaking apart or wearing away of rock
into smaller pieces.
These smaller pieces are known as sediment.
Weathering can be caused by water, ice & wind.
Weathering
______________ weathering when weathered rock in changed into other
materials.
_________ is the main factor that causes chemical weathering.
Water can dissolve some ________ in the air and soil to form a ____ ___
water that can dissolve some _______, like limestone.
This is how _________ are formed.
Weathering
Chemical weathering when weathered rock in changed into other
materials.
_________ is the main factor that causes chemical weathering.
Water can dissolve some ________ in the air and soil to form a ____ ___
water that can dissolve some _______, like limestone.
This is how _________ are formed.
Weathering
Chemical weathering when weathered rock in changed into other
materials.
Water is the main factor that causes chemical weathering.
Water can dissolve some ________ in the air and soil to form a ____ ___
water that can dissolve some _______, like limestone.
This is how _________ are formed.
Weathering
Chemical weathering when weathered rock in changed into other
materials.
Water is the main factor that causes chemical weathering.
Water can dissolve some chemicals in the air and soil to form a weak acid
water that can dissolve some rocks, like limestone.
This is how _________ are formed.
Weathering
Chemical weathering when weathered rock in changed into other
materials.
Water is the main factor that causes chemical weathering.
Water can dissolve some chemicals in the air and soil to form a weak acid
water that can dissolve some rocks, like limestone.
This is how caves are formed.
Erosion
_____ is the
carrying away
of sediment
by moving
wind, water,
or ice.
Erosion
Erosion is the
carrying away
of sediment
by moving
wind, water,
or ice.
3
Causes
Of
Erosion
Water
Water
In rivers and streams,
rocks _____ _____ by
_____ rub against other
rocks.
Over time, _____ _____
break off the rocks.
The rocks are ____ ____
and become ________
and _______.
Water
In rivers and streams,
rocks moved along by
water rub against other
rocks.
Over time, _____ _____
break off the rocks.
The rocks are ____ ____
and become ________
and _______.
Water
In rivers and streams,
rocks moved along by
water rub against other
rocks.
Over time, sharp edges
break off the rocks.
The rocks are ____ ____
and become ________
and _______.
Water
In rivers and streams,
rocks moved along by
water rub against other
rocks.
Over time, sharp edges
break off the rocks.
The rocks are worn down
and become smoother
and smaller.
Water
__________
erosion can change
shorelines.
Waves can ____
____ large
amounts of ____
and ____.
Water
Ocean-wave
erosion can change
shorelines.
Waves can ____
____ large
amounts of ____
and ____.
Water
Ocean-wave
erosion can change
shorelines.
Waves can wash
away large
amounts of sand
and rock.
Water Erosion
Georgia's Providence Canyon
3
Causes
Of
Erosion
Water
Wind
Wind
Wind can make loose bits of sand and soil ____ or ______
across land.
Wind
Wind can make loose bits of sand and soil roll or bounce
across land.
Wind
Wind can also cause particles of sand and soil to ___
_______ rocks and _____ ____ small pieces of rock.
In this way, ___ ____ ______ are carved by the wind over
time.
Wind
Wind can also cause particles of sand and soil to rub
against rocks and carry away small pieces of rock.
In this way, ___ ____ ______ are carved by the wind over
time.
Wind
Wind can also cause particles of sand and soil to rub
against rocks and carry away small pieces of rock.
In this way, new rock shapes are carved by the wind over
time.
3
Causes
Of
Erosion
Water
Wind
Glaciers
A ______ is a large mass of slow-moving ice
that flows down a slope.
A glacier is a large mass of slow-moving ice
that flows down a slope.
As a glacier moves, it collects ___________ at its
____.
A glacier can ________mountainsides that form ________
valley and canyons.
As a glacier moves, it collects rocks and soil at its
base.
A glacier can _______ mountainsides that form ________
valley and canyons.
As a glacier moves, it collects rocks and soil at its
base.
Glaciers can carve out mountainsides that form U-shaped
valley and canyons.