Transcript of Do Now: 1. Using your reference tables (page 2) tell me the three general landscapes found in New...
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- Do Now: 1. Using your reference tables (page 2) tell me the
three general landscapes found in New York State. 2. Take out a
calculator. HW: R&H 302-304 A&E 1-6 4/14/11
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- All three landscape regions are classified on the basis of
gradient, elevation, and rock structure. Plains are characterized
by low elevation, little change in slope, and horizontal
sedimentary rocks. Long Island is part of the Atlantic Coastal
Plain which stretches down the eastern seaboard to Florida
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- Plateaus are areas of high elevation with horizontal
undistorted rock structure. Plateaus may have regions with a more
level slope or regions with steep slopes. These steep slopes are
the result of valleys cut by streams or glaciers, creating an
eroded plateau.
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- Mountains are characterized by high elevation, steep gradients,
and distorted rock structures. These distorted structures consist
of faults, folds, or volcanic rock.
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- What are the three types of landscapes? What are their
characteristics? How do we differentiate between a mountain and a
plateau?
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- Aim: What affects the development of the landscapes we see? Do
Now: 1. Take out your laptops 2. Go to the class website and find
the link to your class Landscape Survey under the useful links tab
and take the survey. HW: R&H 304-309 A&E 7-18
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- Uplifting and Leveling Forces Uplifting Forces are those which
raise landscapes and are powered by the convection cells in the
aesthenosphere. Leveling Forces are those which work to breakdown
or lower landscapes and are powered by energy from the sun and
gravity. When one force is stronger than the other the landscape
will change to resemble the stronger force
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- Landscapes and Climate Arid Climates are characterized by
little vegetation No vegetation = rapid weathering and erosion
Therefore arid climates have steep slopes and angular landscapes
Humid climates have abundant vegetation which hold the sediments
better Humid climates are characterized by gentle slopes and more
rounded landscapes, chemical weathering also helps make these
features
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- Arid or Humid?
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- Impact Craters Impact craters form when meteors crash into
Earths surface. There are less impact craters found on Earth than
other celestial bodies because of weathering, erosion, bodies of
water, and Earths atmosphere. When a meteor hits partial melting of
the crust occurs and ejecta are shot up into the air, and fall
surrounding the crater. Barringer Meteor Crater, Arizona
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- Aim: How do landscapes affect stream drainage? Do Now: 1. Name
the rock layer that is most resistant to weathering and erosion. 2.
Name the rock layer that is the least resistant to weathering and
erosion. 3. Explain your choices. HW: R&H 311-313 A&E 19-25
2. 1. 5. 4. 3. 6. Escarpment 4/25/11
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- Dendritic Drainage Usually occurs in areas of horizontal
sedimentary rocks. The rocks show little difference in
resistance
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- Trellis or Block Drainage Seen in folded and faulted rock with
a great difference in rock resistances
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- Radial Drainage Occurs in domed structures (i.e. volcanoes) and
rocks used have little difference in resistance
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- Annular Drainage Forms in areas where dome structures are
present but there is much difference in rock resistance. Concentric
Circles form.
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- Lets Play the Stream Dream Team Challenge
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- Aim: How do humans affect the Landscapes we see? Do Now: 1.
What is the current world population of the human race? 2. Take out
your review books HW: R&H 315-317 A&E 26-30 4/26/11
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- Population Growth The human population on Earth is growing at
an exponential rate (i.e. 1 makes 2, 2 makes 4, 4 makes 8, etc.)
This rapid increase in population over a short period of time has
had many effects on our natural environment
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- Landscape Change Deforestation leads to an increase erosion
Increase in surface runoff caused by construction of roads
increases erosion Chemicals added to the environment by human
activities increases chemical weathering of landscapes
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- Atmospheric Change Aerosols (CO 2, Methane, Water Vapor) added
to the atmosphere by human activity can trap infrared heat
reradiated by the Earths surface (Greenhouse Effect). Aerosols can
also lead to an increase in precipitation, changing the rates of
weathering an erosion in a given area.
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- Going Green In 2008 the average American produced 4.5 pounds of
solid waste per day. The same year it was reported that the average
Long Islander produced 9 pounds of waste per day.
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- Take out Review Books Page 309