Earth's Interior
Convection and the Mantle
Drifting Continents
100

What are the layers of earth?

the crust, mantle, outer core, and inner core

100
What are the three types of heat transfer?
radiation, conduction, and convection
100
What is the hypothesis that all the continents were once joined together in a single landmass and have since drifted apart?
continental drift
200
What we call the uppermost part of the mantle?
the lithosphere
200
What type of heat is transfered by the movement of currents within a fluid?
convection
200
What do we call any trace of an ancient organism that has been preserved in rock?
a fossil
300
What are the waves that geologists use to study earth's interior?
seismic waves
300
What do heating and cooling of the fluid, changes in the fluid's density, and the force of gravity combine to set these in motion?
convection currents
300
What is the name of the scientist that thought of continental drift?
Who is Alfred Wegener.
400
Why do geologists use seismic waves to study earth's interior?
geologists cannot look inside earth
400
What is the measure of how much mass there is in the volume of a substance?
density
400
According to Wegener, what is the name of the supercontinent formed from continents drifted together?
Pangea
500
What do scientists think creates earth's magnetic field?
movements in the liquid outer core
500
What is the term we use for heat transfer within a material or between materials that are touching?
conduction
500
Why was Wegener's hypothesis rejected?
Wegener could not provide a satisfactory explanation for the force that pushes or pulls the continents.
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