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Continental Drift
Earths layers and heat
Plate tectonics
Earthquakes
Volcanoes
100
The continents were once a single landmass that drifted apart was proposed by this person
Who is Alfred Wegner
100
radioactive decay and heat of formation
What are the two sources of Earth's internal heat energy?
100
This prevents frock from moving past each other in a fault.
What is friction?
100
the sudden return of deformed rock to its undeformed shape
What is elastic rebound theory?
100
Areas of earth's surface through which magma and gases pass.
What are volcanoes?
200
What was the first observation made by Alfred Wegener that led to his theory.
Continents seeming to fit together.
200
crust and upper mantle make up this part of the Earth
What is the lithosphere?
200
Undersea mountain chain that forms as magma rises and creates new sea floor as tectonic plates move apart
What is mid-ocean ridge?
200
The point on the Earth's surface directly above the earthquake's focus.
What is the epicenter?
200
Type of eruption where lava covers a large area
What is a non-explosive eruption.
300
The plates move with the help of heat that is brought up from the core they this method.
What are convection currents?
300
The earth warmed up after this occurred
What is bombardment by solid particles?
300
The stripes in the sea floor illustrate Earth’s alternating what
What is Magnetic Symmetry?
300
Analyzing the arrival time of P waves and S waves
What is finding the epicenter?
300
Steep conical hill with straight sides.
What is an ash and cinder cone volcano?
400
The continents once formed part of a single landmass
What is Pangea
400
When a particle or radiation is given off this happens
What is radioactive decay?
400
When two oceanic plates converge they create
What is a trench?
400
stretching or pulling force makes this type of fault
What is normal?
400
forms when lava erupts from long cracks, or fissures, and spreads out evenly (thousands of km)
What is a fissure volcano
500
The four pieces of evidence used to prove continental drift
What is fossil evidence, coastline evidence, geologic evidence and climatic evidence?
500
The substances in Earth's core that create the magnetic field and density needed to match estimates of Earth's mass.
What is iron and nickel?
500
Warm less dense rock rises and pushes the older denser rock away from the ridge.
What is ridge push?
500
Earthquake waves are recorded by this machine
What is a seismograph?
500
when the magma chamber empties and its roof collapses.
What is s caldera volcano?