Central topic

Mountain

more than 600m

steep slopes and narrow tops

Hill

less than 600m

gentle slopes and rounded shape

Valley

Plain

broad, flat and low area

Plateau

raised area of land with flat and broad tops

Core

5000 degrees Celsius

solid state

Mantle

2900 km

2000 degrees Celsius

80 percent of the Earth's volume

semi-liquid state

Crust

6-70 km

solid state

Fold mountains

formed when crust buckles and form folds

Eg. the Himalayas & the Alps

Vulcanicity

Magma reach Earth = lava

commly found at the boundaries of plates

active volcano

erupted from time to time and likely to do so again

dormant volcano

presently inactive but may erupt again

extinct volcano

unlikely to erupt again

formed when lava spreads over a large area and solidifies

Weathering

caused by large changes in temperature

Action of water

Action of freezing water

Plant growth

Erosion

Action of running water

Action of waves

Action of wind

Location of homes

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