NATURAL HAZARDS (Different kinds of Natural Hazards: (Land slide (Land…
Different kinds of Natural Hazards:
Land slides are when several forms of mass wasting that include a wide range of ground movements, such as rockfalls, deep-seated slope failures, mud flows and debris flows.
An earthquake is the shaking of the surface of the Earth. Earthquakes can be extremely violent and are caused by movements of the Earth's tectonic plates.
A volcano is an opening in the Earth's crust. It allows hot magma, ash and gases to escape from below the surface.
A tsunami is a huge sea wave that is caused from the displacement of a large volume of water. Tsunamis can also be caused by earthquakes triggering sections of the Earth's crust under the ocean.
A large, destructive fire that spreads quickly over woodland or brush.
A hurricane is a large rotating storm with high speed winds that forms over warm waters in tropical areas.
The Earth has many layers:
The mantle- The mantle is the thickest layer of the Earth. It is up to 2,890km thick.
The crust- The plates "float" on the mantle which is located below the crust. The crust of the Earth is broken into many pieces called plates.
The outer core- The outer core is almost at the centre of the earth. It is about 2,266km thick. It is made of iron and nickel. The temperature (heat) of the outer core ranges from 4,400 °C in the outer regions to 6,100 °C.
The inner core- People think the inner core has lots of gold in it. It is a solid ball that is about 1,220km thick. Its temperature (heat) is similar to the sun – about 5505°C. The inner core is the centre of the earth.
There are 4 different plate boundaries:
Constructive- is when two plates move apart as that happens magma rises to fill the gap
Destructive- continental plates and oceanic plates meets and the oceanic plate goes underneath
Conservative- when plates slide past each other without directly colliding
Collision- when two plates of similar densities move together causing a fold