Where does scientific knowledge of the Earth’s interior primarily come from?
What is Seismic waves....produced by earthquakes?
100
A volcano that is erupting; or one that, while not erupting at the present, has erupted within (geologically) recent time and is considered very likely to do so in the (geologically) near future.
What is active?
200
The process of mechanically and chemically break down rock into little pieces, and after they can be eroded and transported...........
What is weathering?
200
Magma originates in which layer of Earth.....
What is mantle?
200
This type of eruption is happening when pyroclastic materials are released
What is explosive?
200
This happens at a transform boundary that can cause an earthquake....
What is plates sliding past each other?
200
The point on the surface directly above the point at which an earthquake occurs....
What is epicenter?
300
Energy derived from the internal heat of the earth......
What is geothermal?
300
10. Convergent plate boundaries __________.
a. spread apart Earth's surface
b. force one plate beneath Earth's surface
c. don't produce volcanoes
d. create volcanoes that are not as violent as others
What is A!
300
Volcanoes often are found in areas on Earth where.......
What is where plate collide?
300
The center of the earthquake is called the.....
What is focus?
300
The theory that the earth's crust is broken into about fragments, which move in relation to one another, shifting continents, forming new ocean crust, and causing volcanic eruptions.
What is plate tectonics?
400
A ___________ is an educated guess, based on observation
What is a hypothesis?
400
Forces of __________ result in rocks being stretched apart
What is tension?
400
Name one of the two factors that control the explosiveness of an eruption
What is water vapor or silica?
400
Most earthquakes take place at tectonic plate boundaries because
A. the rock in the interior of a tectonic plate is stronger so it does not deform.
B. Earthquakes take place where energy is transferred to rock by the motion of tectonic plates.
C. Earthquakes can only occur at places where magma can reach the surface and transfer energy to rocks.
D. Earthquakes take place when one plate moves over another plate, which happens only at plate boundaries
What is B
400
The last time the continents were together is called......
What is Pangaea?
500
Earth's atmosphere consists mostly of?
A. Oxygen and Nitrogen
B. Hydrogen and helium
C. Carbon dioxide and argon
D. Oxygen and hydrogen
E. Carbon Dioxide and Oxygen
What is A?
500
The regions of mountain-building earthquakes and volcanoes which surround the Pacific Ocean
What is ring of fire?
500
What causes magma to rise to the surface?
a. Magma is more dense than rock.
b. Magma is less dense than rock.
c. A force pulls the magma upward.
d. The rock forces the magma upward.
What is B
500
Instruments that measure motions of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions, and other seismic sources
What is seismograph of seismometer?
500
The area of convergence of two tectonic plates, one of which usually overrides the other.