Card Set Information
Atmosphere Plate Tectonics
Atmosphere and Plate Tectonics
What is the theory of plate techtonics?
States that earth's crust and upper mantle are broken into sections.
What are the sections called?
What are the crust and upper mantle together called?
What is the name of the plastic-like layer below the lithosphere?
What is the convection current?
The cycle of differences in density cause hot, plastilike rock to be forced upward the surface, cool, and sink.
What are four types of plate movements?
moving together, moving apart, colliding, and sliding
What happened during the 1940s and 50s?
Scientists began using sound waves on moving ships to map large areas of the ocean floor in detail.
Where are the oldest rocks found?
Far from the mid-ocean ridges.
What did the scientist Henry Hess suggest?
He suggested an explanation for the sea floor moving apart.
What happens as the sea floor spreads apart?
Hot magma moves upward and flows from the cracks.
What happens as the new sea floor moves away from the ridges?
It cools, contracts, and becomes denser.
What was the research ship
It was equipped with a drilling rig that allows scientists to dig into the sea floor to obtain rock samples.
Rocks in the sea floor become...
... increasingly older further away from the ridges.
What happens when plates collide?
The denser plate will ride over the less dense plate.
What has Earth's magnetic field always had?
a north and south pole.
What does the magnetic alignment in rocks do?
It reverses back and fourth over time in strips paralell to the mid-ocean ridges.
What is Pangea?
A Super Big continent.
What is the continental drift?
The splitting apart of land over a period of time to their certain locations.
What are puzzle-like fit clues?
The actual shape of the land after it has seperated.
What are fossil clues?
The example of living organisms in multiple continents.
What are plant clues?
The same type of plants on multiple contimets.
What are climate clues?
Same climate on different continets regarding the equator.
What are rock clues?
Along the ares where the continents were once joined, the same types of rocks are found.
What does the atmosphere have?
What do the layers differ in?
They differ in tempature, density and in relative amounts of gases.
Why is the ozone layer warmer?
because it contains a gas called ozone (I wonder where the ozone layer got its name from) which absorbes solar radiation.
What is the troposphere?
The lowest layer of the atmosphere in relation to the Earth, and the tempature drops at a consistent rate as altitude increases.
What is the stratosphere?
the layer of the atmosphere that is in between the troposphere and the mesosphere where the tempature increases as the altitude increases.
What is the mesosphere?
the coldest layer of the atmosphere in which tempature decreases as the altitude decreases.
What is the thermosphere?
the uppermost layer of the atmosphere in which the tempature increases as the altitude increases.
What is the exosphere?
the outermost layer of the thermosphere. the exosphere has gases which escaped from the gravatational pull of earth and exit into space.
What happened when the earth bagan to silitfy 4.5 billion years ago?
volcanic eruptions released a variety of gases which is called out-gasing. The gases were hydrogen, water vapor, anmonia, methane, carbon monoxide, carbin dioxide, and nitrogen.