Transcript How do you use satellite images to predict changes to landscape in

SATELLITE IMAGES
Ways to Predict Changes in Landscapes!
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Write out the Essential Question:
• How do you use satellite images to predict changes to
landscape in the future?
Changes in Landscapes
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Weathering & Erosion
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Weathering - the process where rock is
dissolved, worn away or broken down
into smaller and smaller pieces by
effects of weather
Erosion - the process where smaller
pieces of rock are moved usually by
wind, water, or ice
Changes in Landscapes
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Weathering & Erosion
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Over long periods of time (centuries) weathering
and erosion can cause large canyons like the
Grand Canyon
Water works its way
into small cracks and
crevices breaking
larger rocks into
smaller rocks and
wind/water transport
away
Changes in Landscapes
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Weathering & Erosion
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As the smaller rocks are transported down rivers
and streams deposition will finally occur where
they will settle and form new landforms in new
areas such as deltas
Many times sediment
deposits will cause new
or changing deltas due
to the sediment deposits
carried downstream by
rivers
Rivers
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Rivers are flowing bodies of waters.
Rivers are an important part of the Earth's
water cycle and the sculpting of the
Earth's topography as they carry huge
quantities of water from the land to the
sea.
Rivers
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The early course of a river is often in steep,
mountain areas, with rapidly-flowing cold water.
(Pic nn the left is of an early river and as weathering
and erosion occurs pic to the right is a more
established river)
As a river continues along its course (which is
always changing), the surrounding terrain flattens
out and the river widens. (change over time)
Rivers
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Rivers often meander (follow a winding
path) along their middle course.
Tributaries (smaller rivers or streams) and
runoff flow into the river, increasing the
river's volume (the amount of water it
has).
Rivers often have increased volume and
water speed in the spring, as snow at the
river's source melts.
Landslides
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Landslide happens when rocks and sediment loosen
and roll down a slope (a slanted surface) quickly.
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Causes of landsides:
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Simply when the area is worn down
by the weathering and erosion.
May happen after earthquakes and
volcanoes in area’s that are
already worn down and weathering
Satellite Images
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Darker area’s show water (the darker the deeper)
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Light area’s show eroded land
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Shaded area’s show terrain (inclines)
Satellite Images
Satellite images help us predict past and future
landscapes:
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We can see rivers widening
or branching causing river
valleys
Delta’s forming
Can also predict that after
large rainfalls or ice melting
that area’s like craters will
fill and weather becoming
wider & deeper over time
Satellite Images
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Will also show glaciers (white)
We can study mass, movement, and changes in glaciers
through satellite images & predict future landscapes
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As glaciers melt/become
smaller the water will
wear away surrounding
terrain and will
eventually widen water
bodies (much like
widening rivers)
Interpreting Satellite images
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Click on the Before & After Satellite image
ppt
Complete handout with interpretations of
image comparisons
Turn in the basket when complete, or take
home for homework