Mini-Lab- 10 minutes Textbook p. 27 Person 1 will get the salt
dough from Mrs. Wiley and bring it back after the lab Person 2 will
press their hand into the dough Person 3 will slice the dough and
measure the differences Person 4 will record the answers to the
questions on a sticky note. All members will discuss the
questions.
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Mini-Lab Questions What was the difference in elevation between
the highest and lowest points on your handprint? How are your model
features similar to features on Earth? How are they different?
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Lesson 3: Earths Surface Oceans and Continents Oceans make up
more than 70 % of Earths surface. Many of the features found on dry
land are also found on the ocean floor. Monterey Canyon, comparable
in size to the Grand Canyon
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Lesson 3: Earths Surface Landforms Mountains, plains, plateaus,
canyons, and other features are called landforms. Landforms are
topographic features formed by processes that shape Earths surface.
Characteristics such as size, shape, slope, elevation, relief, and
orientation are used to describe landforms. A landform is usually
identified by its surface form and location. Landforms are not
permanent. Their characteristics change over time. Factors such as
erosion or uplift of Earths surface can create and affect
landforms.
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Slide 8
Lesson 3: Earths Surface Landforms: Elevation Scientists use
the term elevation to describe the height above sea level of a
particular feature. Landforms can have high or low elevation. Can
be negative (below Sea Level) or positive (above Sea Level) Sea
Level is 0 ft.
Slide 9
Lesson 3: Earths Surface Landforms: Relief Relief is a term
that scientists use to describe differences in elevation. Some
landforms have low relief- this means there is a relatively small
difference between the lowest and highest elevation in an area.
Landforms with a large difference between the lowest and highest
elevation have high relief.
Slide 10
Lesson 3: Earths Surface Landforms: Topography Topography is a
term that scientists use to describe the shape of a geographic
area. You can describe the topography of a small area, or the
general topography of a large area.
Slide 11
Lesson 3: Earths Surface Landforms: Plains Plains are landforms
with low relief and low elevation. Plains cover most of Earths
surface. The broad, flat area in the center of North America is
called the interior plains. Plains can form when sediments are
deposited by water or wind, and the soil is often rich. Plains are
often used for growing crops and grazing animals.
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Lesson 3: Earths Surface Landforms: Plateaus Plateaus are areas
of low relief and high elevation. They are much higher than the
surrounding land and often have steep, rugged sides. Plateaus are
less common than plains, but still occur on every continent.
Plateau Formation 1.They can form when forces within Earth uplift
rock layers or cause collisions between sections of Earths crust.
(The Tibetan Plateau is still being formed by collisions between
India and Asia) 2.They can also be formed by volcanic activity.
(The Columbia Plateau in western US is the result of many
successive lava flows)
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Slide 15
Lesson 3: Earths Surface Landforms: Mountains Mountains are
landforms with high relief and high elevation. They are the tallest
landforms of all. Mountains can form in several different ways.
1.Build-up of lava on the ocean floor- Hawaiian Islands 2.Forces
inside Earth fold, push, or uplift huge blocks of rocks- Himalayas,
Rocky Mountains, Appalachian Mountains
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Slide 18
Quiz Time Silent No notes Turn in on my table
Slide 19
Landform Poster With your GROUP Pick mountain, plain, or
plateau (OR a combination) to create a poster about Poster should
include title, defining characteristics, how it forms, and an
illustration USE COLOR Names should be on the back