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3 Parts of the Earth

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Rachael Dolan

on 9 September 2013

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Transcript of 3 Parts of the Earth

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli
The earth's layers
there are 4 layers of the earth, the first layer of the earth is called the CRUST, the second layer of the earth is called the MANTLE, then the two last layers are called the OUTER CORE and the INNER CORE.
3 Parts Of The Earth
There are three main parts of the earth, the atmosephere, lithoesphere, and hydrosphere.
Earths waters
The 5 important oceans, which are, the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean, and the Arctic Ocean.
Land Forms
Changes of the Earth
Landforms change in many ways over time and there are many causes. Many of our mountains formed as a result of the movement of glaciers, collisions from asteroids and the flowing of water. Land forms continue to change as a result of human intervention, as a result of the building of dams and canals and the collateral results of war and carbon emissions.
This picture is
showing you the
first layer of the
earth, called the
This is the
second layer
of the earth
and its called

This is the
third layer of
the earth,
and its called the OUTER CORE.
This the last layer of the earth,and its called the INNER CORE.
The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.
the lithosphere- outermost shell of a rocky planet. On Earth, it comprises the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or greater
hydrospher- in physical geography describes the combined mass of water found on, under, and over the surface of a planet.
The Pacific
The Pacific Ocean is by far the world's largest ocean at 60,060,700 square miles (155,557,000 sq km). According to the CIA World Factbook, it covers 28% of the Earth and is equal in size to nearly all of the land area on the Earth. The Pacific Ocean is located between the Southern Ocean, Asia and Australia and the Western Hemisphere. It has an average depth of 13,215 feet (4,028 m) but its deepest point is the Challenger Deep within Mariana Trench near Japan. This area is also the deepest point in the world at -35,840 feet (-10,924 m). The Pacific Ocean is important to geography not only because of its size but it has been a major historical route of exploration and migration.
Atlantic Ocean
The Atlantic Ocean is the world's second-largest ocean with an area of 29,637,900 square miles (76,762,000 sq km). It is located between Africa, Europe, the Southern Ocean and the Western Hemisphere. It includes the includes other water bodies such as the Baltic Sea, Black Sea, Caribbean Sea, Gulf of Mexico, Mediterranean Sea and the North Sea. The average depth of the Atlantic Ocean is 12,880 feet (3,926 m) and the deepest point is the Puerto Rico Trench at -28,231 feet (-8,605 m). The Atlantic Ocean is important to the world's weather (as are all oceans) because strong Atlantic hurricanes are known to develop off the coast of Cape Verde, Africa and move toward the Caribbean Sea from August to November.

Indian Ocean
The Indian Ocean is the world's third-largest ocean and it has an area of 26,469,900 square miles (68,566,000 sq km). It is located between Africa, the Southern Ocean, Asia and Australia. The Indian Ocean has an average depth of 13,002 feet (3,963 m) and the Java Trench is its deepest point at -23,812 feet (-7,258 m). The waters of the Indian Ocean also include water bodies such as the Andaman, Arabian, Flores, Java and Red Seas as well as the Bay of Bengal, Great Australian Bight, Gulf of Aden, Gulf of Oman, Mozambique Channel and the Persian Gulf. The Indian Ocean is known for causing the monsoonal weather patterns that dominate much of southeast Asia and for having waters that have been historical chokepoints.

Southern Ocean
The Southern Ocean is the world's newest and fourth-largest ocean. In the spring of 2000, the International Hydrographic Organization decided to delimit a fifth ocean. In doing so, boundaries were taken from the Pacific, Atlantic and Indian Oceans. The Southern Ocean extends from the coast of Antarctica to 60 degrees south latitude. It has a total area of 7,848,300 square miles (20,327,000 sq km) and an average depth ranging from 13,100 to 16,400 feet (4,000 to 5,000 m). The deepest point in the Southern Ocean is unnamed but it is in the south end of the South Sandwich Trench and has a depth of -23,737 feet (-7,235 m). The world's largest ocean current, the Antarctic Circumpolar Current moves east and is 13,049 feet (21,000 km) in length.
Arctic Ocean
The Arctic Ocean is the world's smallest with an area of 5,427,000 square miles (14,056,000 sq km). It extends between Europe, Asia and North America and most of its waters are north of the Arctic Circle. Its average depth is 3,953 feet (1,205 m) and its deepest point is the Fram Basin at -15,305 feet (-4,665 m). Throughout most of the year, much of the Arctic Ocean is covered by a drifting polar icepack that is an average of ten feet (three meters) thick. However as the Earth's climate changes, the polar regions are warming and much of the icepack melts during the summer months. In terms of geography, the Northwest Passage and the Northern Sea Route have been important areas for trade and exploration.

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and comprises 30% of its land area. With approximately 4.3 billion people, it hosts 60% of the world's current human population. Asia has a high growth rate in the modern era. For instance, during the 20th century, Asia's population nearly quadrupled.

Australia lies between 10 and 39 degrees south latitude,
also Australia is the driest inhabited continent on the earth.
The Australian federation consists of six States and two Territories. In land area, Australia is estimated to be 7,692,024 square kilometers and the sixth largest nation after Russia, Canada, China, the United States of America, and Brazil. It has, however, a relatively small population.
Atlas Mountains
Africas's Atlas Mountains:
This mountain system runs from southwestern Morocco along the Mediterranean coastline to the eastern edge of Tunisia. Several smaller ranges are included, namely the High Atlas, Middle Atlas and Maritime Atlas. The highest peak is Mt. Toubkal in western Morocco at 13,671 ft. (4,167 m).
Wolfe Creek Crater,W.A.
Australia was hit by a huge meteorite weighing about 50,000 tons. It happened at Wolfe Creek in Western Australia on the edge of the Great Sandy Desert.

Africa is the second largest of the earth’s seven continents and makes up approximately 22% of the earth’s total land area. With the inclusion of the disputed Western Sahara territory and the island nations off the continental coast, there are a total of 54 independent nations in Africa. The current population of Africa is nearly one billion people. Due to rapid population growth in the continent over the last 40 years, its general population is relatively young. More than half of the population is under the age of 25.
The seven continents are the seven main land areas of the earth. Some are joined to each other and some are completely surrounded by others. It is believed that in past ,all continents were joined, this land area was called Pangaea. This area started to break up & got divided into 7 parts ,so today we have 7 continents. These continents are still moving away or moving close to each other. This is called continental drift or plate tectonics theory. For example Europe & North America are said to be moving 7 cm apart every year
Landforms come in many varieties across the planet, ranging from small hills to large mountains and continental shelves. Continuous geological activity constantly alters the landscapes of the planet, although the changes are usually too slow for individuals to notice over a lifetime. Activities -- such as the movement of the earth's tectonic plates, erosion, weathering, earthquakes and volcanic eruptions -- are all the main causes for the formation of landforms.
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