Waves and Wind Chapter 3 Section 3 Standard S 6.2 a Surface water flow, glaciers, wind and ocean...
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Waves and Wind Chapter 3 Section 3
Waves and Wind Chapter 3 Section 3 Standard S 6.2 a Surface water flow, glaciers, wind and ocean waves have all been an continue to be active throughout
Standard S 6.2 a Surface water flow, glaciers, wind and ocean
waves have all been an continue to be active throughout California
and the rest of the world in shaping landscapes. S 6.2 a Surface
water flow, glaciers, wind and ocean waves have all been an
continue to be active throughout California and the rest of the
world in shaping landscapes. S6.2c Students know beaches are
dynamic systems in which the sand is supplied by rivers and moved
along the coast by the action of waves. S6.2c Students know beaches
are dynamic systems in which the sand is supplied by rivers and
moved along the coast by the action of waves.
Input The energy in waves comes from wind that blows across the
waters surface. The energy in waves comes from wind that blows
across the waters surface. The energy that water picks up from the
wind, causes water particles to move up and down as the wave goes
by. The energy that water picks up from the wind, causes water
particles to move up and down as the wave goes by. A wave changes
as it approaches land. A wave changes as it approaches land. Deep
water- wave only affects the water near the surface Deep water-
wave only affects the water near the surface Shallow water- wave
begins to drag on the bottom and it causes the wave to slow down
Shallow water- wave begins to drag on the bottom and it causes the
wave to slow down
Slide 8
Erosion by Waves Waves shape the coast through erosion by
breaking down rock and transporting sand and other sediment. Waves
shape the coast through erosion by breaking down rock and
transporting sand and other sediment. Impact- large waves hit the
rocks along the shore and break them part. Over time pieces of the
rock fall off. Impact- large waves hit the rocks along the shore
and break them part. Over time pieces of the rock fall off. Waves
coming to shore change direction. Waves coming to shore change
direction. Headland- part of the shore that sticks out into the
ocean. Made up of harder rocks Headland- part of the shore that
sticks out into the ocean. Made up of harder rocks
Slide 9
When waves hit a steep, rocky coast they strike the area again
and again. When waves hit a steep, rocky coast they strike the area
again and again. It will begin to erode and make a cut. Each time
it strikes the cut is getting bigger and bigger. It will begin to
erode and make a cut. Each time it strikes the cut is getting
bigger and bigger. Eventually, waves erode the base of a cliff so
much that the rock collapse. Eventually, waves erode the base of a
cliff so much that the rock collapse. Wave- cut cliff= waves erode
the soft rock along the base of a steep coast and the results is a
new landform called a wave-cut cliff Wave- cut cliff= waves erode
the soft rock along the base of a steep coast and the results is a
new landform called a wave-cut cliff
Slide 10
Slide 11
Deposits by Waves Waves shape a coast when they deposit
sediment, forming coastal features such as beaches, spits,
sandbars, and barrier beaches. Waves shape a coast when they
deposit sediment, forming coastal features such as beaches, spits,
sandbars, and barrier beaches. Beach- an area of wave washed
sediment along a coast. Usually sand is left behind. Beach- an area
of wave washed sediment along a coast. Usually sand is left behind.
Beaches are constantly changing- supply of sand and wave motion.
Beaches are constantly changing- supply of sand and wave motion.
Long shore drift- when waves hit the beach, the beach sediment
moves down the beach with the current Long shore drift- when waves
hit the beach, the beach sediment moves down the beach with the
current
Slide 12
Spits- a beach that projects like a finger out in the water.
Spits- a beach that projects like a finger out in the water.
Barrier Beach- forms when storm waves pile up large amounts of sand
above sea level forming a long, narrow island parallel to the
coast. Barrier Beach- forms when storm waves pile up large amounts
of sand above sea level forming a long, narrow island parallel to
the coast. Silver Strand Beach in California is a great example of
a barrier beach. Silver Strand Beach in California is a great
example of a barrier beach. Some people have built homes on barrier
beaches. Some people have built homes on barrier beaches.
Slide 13
A fast flowing river would mostly likely lift sand sized
particles of sediment and carry them downstream A fast flowing
river would mostly likely lift sand sized particles of sediment and
carry them downstream
Slide 14
Erosion by Wind Sand dune- is a deposit of wind blown sand.
Sand dune- is a deposit of wind blown sand. Wind cause erosion by
deflation and abrasion. Wind cause erosion by deflation and
abrasion. Wind is the weakest agent of erosion Wind is the weakest
agent of erosion In a desert, it is constantly changing. In a
desert, it is constantly changing. Deflation- the process by which
wind removes surface materials Deflation- the process by which wind
removes surface materials The strong the wind, the larger the sand
particles it can pick up. The strong the wind, the larger the sand
particles it can pick up.
Slide 15
Deposition by Wind Abrasion- wind carried sand can polish
rocks, but it causes little erosion. Abrasion- wind carried sand
can polish rocks, but it causes little erosion. Wind erosion and
deposition may form sand dunes and loess deposits. Wind erosion and
deposition may form sand dunes and loess deposits. Wind carrying
sand grains deposits the sand when the wind slows down or hits an
obstacle. Wind carrying sand grains deposits the sand when the wind
slows down or hits an obstacle. Loess- fine, wind deposited
sediment. Particles of clay and silt eroded and deposited by the
wind. Loess- fine, wind deposited sediment. Particles of clay and
silt eroded and deposited by the wind. Mojave Deserts desert
pavement was created through the process known as deflation. Mojave
Deserts desert pavement was created through the process known as
deflation.
Slide 16
Checking for Understanding What are 2 kinds of wind erosion?
What are 2 kinds of wind erosion? How does an ocean wave change
when it reaches shallow water? How does an ocean wave change when
it reaches shallow water? What are 2 ways in which waves cause
erosion? What are 2 ways in which waves cause erosion?
Slide 17
Guided Practice Independent Practice Guided Practice: Page 67
of Wave worksheet Guided Practice: Page 67 of Wave worksheet First,
intrapersonally. First, intrapersonally. Second, with a partner
interpersonally. Second, with a partner interpersonally.
Independent Practice: Wave Worksheet Independent Practice: Wave
Worksheet