Earth Layers
The Earth is composed of ______ different layers.
Four
4
A sudden, rapid shaking of the Earth caused by the release of energy stored in rocks is known as an __________
earthquake
Rocks are made out of two or more ___________
minerals
The most common gas in the atmosphere is ________
nitrogen
N2
Two plates are moving in opposite directions, also known as a ______________ boundary.
Divergent
The layer that we live on is the __________
crust
__________ is molten rock that is located under the surface of the Earth
magma
Most minerals are made out of ________
crystals
The lowest layer of our atmosphere is known as the _________
troposphere
The fastest seismic waves are known as __________
P waves
primary waves
The crust and the upper layer of the mantle make up a zone of rigid rock called the ________.
lithosphere
When the magma reaches the surface of the Earth it is then called ____________
Lava
Rocks that formed from magma are called__________ rock.
igneous
T/F
Earth is the only planet in the solar system with an atmosphere.
false
____________ waves cause the most destruction during an earthquake.
Surface
The ________ is the part of the mantle that flows and moves the plates of the Earth
asthenosphere
two plates collide to form mountains is known as a _________ boundary.
convergent
Billions of years ago, the Earth's continents were all connected into one huge landmass called ______
pangaea
The ___________, which absorbs UV light from the sun, is found in the stratosphere.
ozone layer
Most satellites orbit Earth in the ___________ layer.
thermosphere
The mantle flows and moves because of ___________
convection currents
The point directly above the focus on the surface of the Earth is called the __________
epicenter
The ___________ states that the continents have moved and are still moving today
continental drift theory
Besides human activity, sulfur oxides are introduced to the atmosphere through ____________
volcanoes
volcanic activity
Rocks that are formed from heat and pressure are called ___________rocks.
metamorphic