Show:
The Theory of Plate Tectonics
Earth's Interior
Convection and the Mantle
Drifting Continents
Sea-Floor Spreading
100
According to Wilson, the lithosphere is broken into separate sections. What do we call these sections?
What are plates?
100
What are the layers of earth's interior?
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
100
What is the name of the stream of mountains that curve along the sea-floor, extending into all of earth's oceans?
mid-ocean ridge
200

It is also known as constructive plate boundary 

Divergent boundary 

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
200
A radical idea proposed by Hess that new material is added to the ocean floor.
What is sea-floor spreading.
300
What is the theory that states that pieces of earth's lithosphere are in slow, constant motion, driven by convection currents in the mantle?
plate tectonics
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.
300
What is the name of the device that bounces soundwaves off underwater objects?
What is sonar.
400
What does the theory of plate tectonics explain?
the formation, movement, and subduction of earth's plates
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
400
Is sea-floor spreading a fact?
no.
500
What are the three kinds of plate boundaries? What type of plate movement does each have?
divergent boundary - the place where two plates move apart convergent boundary - the place where two plates come together, or converge transform boundary - a place where two plates slip past each other, moving in opposite directions
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.
500
This is a valley where molten material seep up from the earth's mantle and into the mid-ocean ridge.
What is a rift valley.