Physical Processes Mrs Comeros Science Earths Surface The
- Slides: 53
Physical Processes: Mrs. Comeros Science
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.
U-shaped Valley V-shaped Valley Cave Atoll
Lets Think!!! • Does Earth’s surface ever change? • What causes those changes? • Why? How? Examples?
Physical Processes: • Earth’s surface is constantly changing. • Different natural events, such as earthquakes and volcanoes, change the size and shape of landforms. • These events are known as physical processes.
Example: Mt. Saint Helens (1980) Before After
Example: Earthquake/Tsunami in Japan Before After
Mountain Definition: A natural rise of the earth with steep sides. Mountains are formed when plates collide and the land buckles upwards.
Earthquake Definition: Occur when two of the earth’s plates move causing vibrations, or shaking to occur.
Bam, Iran 12/26/2003
Volcano Definition: An opening in the earth’s crust from which lava flows.
Mt. St. Helens 5/18/1980
Weathering and Erosion
Weathering Definition: The wearing away of a surface through weather conditions, such as wind, rain or ice.
Mount Rushmore It will not be there forever!! There is a pile of weathered material at the bottom. It is slowly being eroded down hill by gravity. Mrs. Degl 18
Erosion Definition: A process that breaks rocks down into tiny pieces and moves them to another location.
Erosion: The Grand Canyon was formed by erosion.
Running Water
Wind Erosion
Glaciers
U-Shaped Valleys Formed when a glacier erodes a river valley from its original V shape to a U shape Continue
V-shaped valley U-
Mass Movements Gravity • Landslides, mudslides, slump and creep landslide clip. mpeg
Wave Erosion
Beach Erosion
Sea Arch
Sea Arches
Flooding Definition: An overflow of water onto land that is normally dry. Flooding is often caused by heavy rains.
Flooding • Overflowing rivers add nutrients to the surrounding soil. • If the Mississippi River were to flood, there would be an increase in fertile soil in the MS River Valley.
Deposition • Deposition is the process in which sediment laid down in new locations. • Caused by water, wind, ice, and gravity.
Deposition Type of Deposition Creates Picture Wind Sand Dune Water *Waves *River *Beaches *Delta Ice Moraine Gravity Landslide, Slump, Creep
What is a delta? • delta -- a place at the river's mouth, where the river splits into many different sections, forming a marshy triangle
What is a river mouth ? • river mouth -- the place where a river empties into a larger body of water
Delta – a fan shaped deposit that forms at the mouth of a river/stream when it enters a larger body of water. This is seen under the water. The particles are horizontally sorted. Mrs. Degl 44
What is a moraine? • moraine* -- An accumulation of boulders, stones, or other debris carried and deposited by a glacier
Check for Understanding: 1. What creates new landforms? a) Earthquakes b) Volcanoes c) Erosion d) All of the Above
Check for Understanding: 2. Which of these does not cause weathering? a) sunshine b) wind c) rain d) ice
Check for Understanding: 3. Which United States landform was most likely caused by erosion? a) The Great Lakes b) The Mississippi River c) The Rocky Mountains d) The Grand Canyon
Check for Understanding: 4. Which physical process most likely formed the Great Smoky Mountains? a) Flooding rivers b) Erupting volcanoes c) Plate tectonics d) Wind erosion
Check for Understanding: 5. Which physical process most likely causes a river to overflow, adding nutrients to the local soil? a) Heavy rains b) Volcanic eruptions c) Strong Winds d) Melting Snow
Check for Understanding: 6. Which physical process most likely shaped the feature shown? a) Plate tectonics b) Volcanic eruptions c) Water erosion d) Coastal flooding
Check for Understanding: 7. Which physical process most likely created the mountain range shown on the map? a) erosion b) flooding c) plate tectonics d) volcanic eruptions
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