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Level 87

Processes That Shape the Earth

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shapes on Earth's surface, such as hills or mountains
breaking down rocks
physical weathering
occurs when mechanical processes break down rock
chemical weathering
the transformation of rock into one or more new compounds
Pollution made up of dirt particles
a large ice mass that moves slowly down a mountain or over land
sand dunes
windblown sand that produce ridges or hills of sand
Air Pressure
This is the measure of the force with which air molecules push on a surface. It is strongest at the Earth's surface because more air is above you. As you move farther away from…
a hill or ridge that forms when sediments are deposited by a glacier
Sedimentary Rock
a type of rock formed from layers of sediment
give an example of chemical weathering
when rainwater combines with carbon dioxide in the air a weak acid is formed
gravity and water
what two things play a big part in erosion
ground water
rainwater stored in rocks and the soil which can flow back to the river or the sea through permeable rock
masses of ice that form in places where more snow falls in the winter then melts in the summer
iron and nickel
what elements make up of both the inner and outer core
Plate Tectonics
The theory that Earth's lithosphere is broken into pieces (plates) that move over the asthenosphere; boundaries between plates are where most earthquakes and volcanoes occur and where lithosphere is created and recycled.
mid atlantic ridge
what is an example of a type of plate boundry
Subduction Zone
a plate boundary where one tectonic plate, usually of oceanic crust, slides under another plate back into the mantle to be recycled.
Igneous Rock
A type of rock that forms from the cooling of molten rock at or below the surface.
Labour Shortage - Mostly people of working age that emigrate
james hutton
a scottish physician who introduced the principle of uniformitarianism
william smith
published the first geologic map of england
relative time scale
a time scale which shows the orders of events in relation to each other without providing ages in years
order of the past geologic events
by studying the folds and faults in rocks scientists can determine the