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RELIEF
The lithosphere is divided ( like a jigsaw puzzle) into tectonic plates that move slowly
The movement has formed relief
(s...
Continents occupy 29%
of the surface of the Earth
Oceans and seas
occupy 71 %
2.1 Continental relief
The relief features are the result of processes that began millions of years ago
Relief was formed ...
erosion
Mountains:
high elevations
on the Earth's surface
Valleys:
Sunken areas
between two
mountains.
River valley: V-shape
Glaci...
River valley Glacial valley
Plateau
2.2 Continental waters
FRESHWATER
SALTWATER
Rivers, glaciers, groundwater, lakes
Inland sea, sea.
Definition: Continuous ...
There are 3 parts or courses of a river
-The first part of the river
-The river flows fast:
erosion
- Waterfalls, rapids
...
Meander
Drainages basins
Estuary
Delta
Glacier
Mass of ice that forms at the top of the mountains
Groundwater
Underground water. Created by filtration. It crea...
Groundwater
Estuary
Delta
Groundwater
Glacier
3.1Coastal relief
Cliff: high steep rocks
at the edge of the sea.
Cape: part of the coast that
Stick out into the sea
Gulf...
3.2 Relief on the ocean floor
Continental shelf:
Underwater extension
of a continent.
It has a depth of 200-500 m
Continen...
Ocean floor
4.1 Volcanic eruptions
Definition: Volcano is an
opening in the Earth´s
crust through which lava,
fire, smoke,
and ash are...
Crater
Lava
4.2Earthquakes
Definition: tremors or shaking in the
Earth´s crust that can cause fissures and
movements on the Earth´s su...
Unidad 8
Unidad 8
Unidad 8
Unidad 8
Unidad 8
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Unidad 8

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Transcript of "Unidad 8"

  1. 1. RELIEF
  2. 2. The lithosphere is divided ( like a jigsaw puzzle) into tectonic plates that move slowly The movement has formed relief (separation or collision) Emerged land Submerged land - Continents: - Surrounded by oceans and seas: Pacific Ocean, Atlantic Ocean, Indian Ocean Southern Ocean, Arctic Ocean. Asia, Africa, America Antarctica ,Europe, Oceania. - 200 million years ago there was a single continent: Pangea Its fragmentation created the existing continents
  3. 3. Continents occupy 29% of the surface of the Earth Oceans and seas occupy 71 %
  4. 4. 2.1 Continental relief The relief features are the result of processes that began millions of years ago Relief was formed by two kind of forces Internal forces: create the relief (Movement of tectonic plates, volcanic eruptions) External agents: erode the relief (wind, rain, rivers, seas, etc) Simple landforms of the continental relief are: mountains, valleys, plains, mesetas/plateau Erosion: destroy the surface of something through the action of wind, rain, sea,etc
  5. 5. erosion
  6. 6. Mountains: high elevations on the Earth's surface Valleys: Sunken areas between two mountains. River valley: V-shape Glacial valley: U-shape Plateau Flat area at high altitude Plain: Flat areas not higher than 200 m above sea level 2.1 Continental relief
  7. 7. River valley Glacial valley Plateau
  8. 8. 2.2 Continental waters FRESHWATER SALTWATER Rivers, glaciers, groundwater, lakes Inland sea, sea. Definition: Continuous courses of water that flow naturally. They are created by The volume is the amount of water carried by the river River bed: Route followed by the river from the source to the mouth Tributary: river that flows into the main river Drainage basin: It is formed by a river and their tributaries Rivers accumulation of rainwater, melted snow and ice from mountains and springs.
  9. 9. There are 3 parts or courses of a river -The first part of the river -The river flows fast: erosion - Waterfalls, rapids Rivers Upper part Middle part -Middle part of the river -The river flows more slowly -Rivers star to bend. -Bends in a river are called meanders Lower part -The final part -The river flows very slowly -It leaves the sediments -The mouth of a river can be Estuary: wide part were it flows into the sea. Delta: accumulation of materials, often triangular shape. River divides into lot of smaller channels Upper part Lower part Middle part
  10. 10. Meander Drainages basins
  11. 11. Estuary Delta
  12. 12. Glacier Mass of ice that forms at the top of the mountains Groundwater Underground water. Created by filtration. It creates stalactites and stalagmites Inland lake Permanent accumulation of freshwater in a sunken area of land Permanent accumulation of saltwater in a sunken area 2.2 Continental waters Inland sea Piece of rock hanging down from the roof of a cave Piece of rock upwards from the floor of a cave Formed from drops of water
  13. 13. Groundwater
  14. 14. Estuary Delta Groundwater Glacier
  15. 15. 3.1Coastal relief Cliff: high steep rocks at the edge of the sea. Cape: part of the coast that Stick out into the sea Gulf: deep inlets of the sea Beach: accumulation of sand Peninsula: Area of land surrounded almost completely by water except for a part that is join to the mainland
  16. 16. 3.2 Relief on the ocean floor Continental shelf: Underwater extension of a continent. It has a depth of 200-500 m Continental slope: The incline after the continental shelf Abyssal plain: Large flat area at the bottom of the ocean Ocean trench: Sunken area Ocean ridge: Underwater mountain
  17. 17. Ocean floor
  18. 18. 4.1 Volcanic eruptions Definition: Volcano is an opening in the Earth´s crust through which lava, fire, smoke, and ash are ejected. They are caused by movements inside the Earth. -They can be active, extinct or dormant. Parts:
  19. 19. Crater
  20. 20. Lava
  21. 21. 4.2Earthquakes Definition: tremors or shaking in the Earth´s crust that can cause fissures and movements on the Earth´s surface. - To measure the strength of the tremors we use a seismograph and create scales: Richter Scale -Earthquake with an epicentre at the bottom of the sea cause tsunamis ( enormous waves, can be up to 40 m) Parts:

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