Earth's Interior Lesson 1
Prentice Hall Science Explorer: Inside Earth Chapter 1 Section 1 Earth's Interior
Terms in this set (15)
vibrations that travel through Earth carrying the energy released during an earthquake; the speed of these and the paths they take give geologists clues about the structure of the planet
results from the force pushing on a surface divided by the area of that surface
the layer of solid rock that includes both dry land and the ocean floor; main elements of it are oxygen and silicon; it is thickest under mountains and thinnest under the ocean
a dark, dense, igneous rock with a fine texture, found in oceanic crust - the crust that lies beneath the ocean
a usually light-colored igneous rock that is found in continental crust
made of rock that is very hot, but solid. its layers are divided based on the physical characteristics of those layers. overall it is nearly 3,000 kilometers thick
a rigid brittle layer made up of the uppermost part of the mantle; it averages 100 kilometers thick and is above the asthenosphere
the soft layer of the mantle on which the lithosphere floats; it is hotter and under more pressure than the lithosphere but is less rigid and brittle; It is solid but can bend like a metal spoon. If you kicked it you would stub your toe
a layer if molten iron and nickel that surrounds the inner core of Earth; despite enormous pressure it is liquid
a dense sphere of solid iron and nickel at the center of Earth; in this area extreme pressure squeezes the atoms of iron and nickel so much they cannot spread out to become liquid
the crust that forms the the continents; it is made of many types of rocks
Typical rock is basalt; relative grain size fine; color dark; thinner part of the crust
What is the makeup of the oceanic crust?
Typical rock is granite; relative grain size coarse; color light; thicker part of the crust
What is the makeup of the continental crust?
lies below Earth's mantle and is made mostly of the metals iron and nickel. It consists of two parts - a liquid outer _________ and a solid inner ________
crust, mantle, outer core, inner core
What is the structure of the Earth?