chapter 2 terms and definitions part 1 Flashcards
Solid and hot because it is under a lot of pressure.`
inner core
Liquid material that surrounds the inner core.
outre core
A liquid and semi liquid layer that exists between the outer core and crust the upper part is known as the asthenosphere, this section is involved in plate tectonics.
mantle
melted rock that makes up the mantel
magma
Melted rock that is exposed to the atmosphere
lava
A solid but brittle
outer layer of the planet
Crust (Lithosphere)
In 1915, German Geologist Alfred Wagner proposed that the Earth’s crust is not solid but made up of plates moving up the mantle. He examined the shape of the continents, rock structures, and recovered fossils to come up with his theory. He believed there was once a supercontinent called Pangea and a sea called Panthalassa
The Theory of
Continental Drift
The theory that the earth’s plates interact to produce mountains, trenches, earthquakes, and volcanoes.
plate tectonics
Area of the Atlantic Ocean where the seafloor is expanding.
Mid-Atlantic ridge
Area where one plate is pulled down beneath another creating volcanoes and earthquakes.
Subduction Zone.
The natural features of the land’s surface.
topography
Height above sea level
Elevation
The difference in elevation between points
Relief
The steepness of slopes
Gradient
Types of rocks and the history of them.
Geology