Physical Processes: Mrs. Walker 4 th Grade. Earth’s Surface:. The surface of the earth is made up of many different landforms. A landform is a natural shape and type of land on Earth’s surface. Landforms:. Mountains Hills Plateau Plains Valley. River Peninsula Canyon Glacier
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Physical Processes:Mrs. Walker 4th Grade
Land and Water Formations
The theory that Earth’s plates float on magma and slowly shift over time.
A large sheet of rock that makes up Earth’s outer crust.
Definition: A natural rise of the earth with steep sides.
Mountains are formed when plates collide and the land buckles upwards.
Definition: Occur when two of the earth’s plates move causing vibrations, or shaking to occur.
Earth’s crust has many weak spots along plate edges. When plates rub against each other, Earth’s crust cracks and chips under the pressure. These cracks are called faults. When the crust moves along faults, great amounts of energy are released in the form of earthquakes. Earthquakes cause dramatic changes to the surface of the earth.
Bam, Iran 12/26/2003
An opening in the earth’s crust from which lava flows.
Plates move in different directions. In some places, plates move apart and magma leaks out through cracks in the crust. In other places the plates push against each other. This pressure forces one plate to slide under the other. Overtime, tremendous pressure and heat build up. Molten rock gushes upward, exploding from beneath the ground. This is how volcanos are formed.
Mt. St. Helens 5/18/1980
Formed when 2
plates collide and
one plate moves
under another causing
magma to flow
Formed when plates collide and the land buckles upward.
Formed when 2 plates move and rub against each other causing vibrations,
Definition: The wearing away of a surface through weather conditions, such as wind, rain or ice.
Definition: A process that breaks rocks down into tiny pieces and moves them to another location.
The Grand Canyon was formed by erosion.
An overflow of water onto land that is normally dry.
Flooding is often caused by heavy rains.