Show:
Earthquakes
Plate Tectonics
Volcanoes
The Theory
random
100
what kind of waves are responible for all the damage an earthquake causes
What is siesmic wave
100
What is plate tectonics
What is the theory of which states the Earth's crust and upper mantle are broken into sections
100
who's theory was that the sea floor was spreading away from eachother from the sea floor having more and more mountains
What is Herry Hess
100
What is the form of the continents when they were together.
What is Pangea
200
what scale is used to describe the strength of a earthquake
What is the richard scale
200
these sections are called
What is Plates
200
the hot (blank comes out of a volcano to form lava
What is magma
200
who was the man to suggest that the continents were joined together in the past
What is Alfred Wegener
200
(blank) Also, fossils of warm weather plants have been found in (blank)
What is Africa and the Arctic
300
what scale is used to describe the amount of damagew an earthquake causes
What is meralli scale
300
the crust and upper mantle together are called
What is the lithosphere
300
What can make more rock when cooling
What is molten rocks from volcanoes
300
What was the name of all the continents when they were together
What is pangea
400
scientists suggest that differences in density cause hot plasticlike rock to be forced upward toward the surface cool and sink this cycle is called
What is convection
400
what happens when new seafloor moves away from a ridge cools and becomes denser
What is more rock is formed.
400
what similar (blank) structers exist in the appalachian mountains and in Greenland and western Europe
What is Rock structers
500
where do earthquakes ussually form
What is anywhere where plates shift
500
beneath the lithosphere is the plasticlike
What is the athenosphere
500
what else can come from a volcanoes end
What is gasses and ash
500
Are any of these theorys 100% prooven
What is no