Looking @ Earth

Water & LandEarth is made up of 70% water (hydrosphere) &

30% land (lithosphere).Tallest point on earth is Mount Everest in Asia

standing 29,028 ft. above sea levelLowest is the shore of the Dead Sea 1,312 ft.

below sea level

Earth’s StructureComposed of 3 layers:1- Crust= Outer layer only 3-30 miles deep, land

includes the continents that float on lava from the upper mantle

2: Mantle= largest layer of earth made mostly of dense hot rock.

3: Outer/Inner CoreA. Outer core= begins 1,800 miles below the

surface & made of melted iron & magnesium.B. Inner core= begins 4,000 miles below the

surface & made of solid iron & nickel.

Shaping/Moving EarthDo the Continents move & if so how do they move?Continents sit on top of plates that are floating on

the magma of the upper mantle.Movement of the plates can have different effects

on the earth.A. Spread Apart= causes melted rock to form

ridgesB. Slide past each other= Forming a trenchC. Bump together= forming mountains

When the plate’s movement happens, this causes an earthquake.

Shaping/Moving Earth

Shaping/Moving Earth

Shaping/Moving EarthHow safe are we from a major earthquake?

Haiti EarthquakeThe quake struck on January 12, 2010 at 4:53 p.m.The 7.0 magnitude quake's epicenter hit just 10

miles west of Porte-au-Prince & its 2 million inhabitants

Happened when the Caribbean Plate & the NA Plate slid & compressed against each other.

Haiti Fast FactsPopulation of nearly 10 million people.Haiti is the poorest country in the Western

Hemisphere.80% of the population in Haiti is living under the

poverty line.Most Haitians live on less than $2 a day.Haiti has no real construction standards.Death toll from the quake is around 100,000-

200,000

http://www.cnn.com/SPECIALS/2010/haiti.quake/

Shaping/Moving EarthExternal forces that

cause the earth to be shaped are

1. Weathering- the breaking down of earth’s rocks, solids, & minerals.

2 Types: Chemical & Physical

2.Erosion- the wearing away of the earth’s surface by wind & water.

Landforms7 continentsN & S America

located in the Western Hemisphere.

Antarctica is located in both E & W hemispheres

Asia is the LARGESTAustralia is the smallest.

Europe & Africa are mostly in the eastern hemisphere.

Major LandformsLandforms are very different

across earth.4 major kinds1. Mountains- have steep slopes

& have some kind of peak or summit. Highest landforms on earth.

2.Hills- more rounded than a Mt.

3. Plateau- higher than the surrounding land & usually has @ least 1 steep side.

4. Plains- gently rolling or flat lands.

Earth’s ResourcesNatural Resources- Elements from the earth that

aren’t made by people but used by them.Important cause they support & assist human life.Minerals- substances from earth not made of

living things. (aluminum, gold, kaolin etc.)Fossil Fuels- formed from the remains of plants &

animals

Their ValueDon’t have the same value all over the world.What things influence the value of resources?1. Supply- depending on location affects the

value. Where there is a small supply of something, its

usually given a greater value.The value of a resource can change

Distribution of ResourcesCan have great effect on how

countries relate w/ each other.Resources aren’t evenly

distributed throughout the world.

When countries need or desire a certain type of resource they trade w/ other countries.

Imports- goods brought in from another country.

Exports- goods sent from one country.

Many times throughout history, the uneven distribution of natural resources has caused conflict btw countries.