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44 Cards in this Set
- Front
- Back
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How much of the earth is land
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30%
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What was the first major ocean floor structure discovered
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mid ocean ridge
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what is the sun and all the planets called
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the solar system
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how long ago were the sun and planets formed
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4.5 billion
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where were the continents located in the distant past
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southern hemisphere
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what are some terrestial planets
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earth mars venus
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what are some non terrestial planets
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jupiter saturn
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there is more oxygen in the atmosphere because of
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biological activity
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what are the three states of matter
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solid liquid gas
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where is the mid ocean ridge exposed
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ICELAND!
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What kind of the radiation does the sun mostly emit
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visible (green)
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What is important dietarily to global navigation
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vitamin c
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what are ocean mountains called
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mid ocean ridges
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explain magnetic striping
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as the mid ocean ridge expands it creates new layers that have magnetic properties. they record the direction of the magnetic field
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What creates trenches
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subduction
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What ocean is surrounded by trenches
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pacific
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what are the three tectonic plate boundaries
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divergent, convergent and transform
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how does a tranform fault work
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it is when plates are niether moving toward or away from each other but sliding past
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trenches lead too
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volcanoes and earthquakes
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what is the southern ocean
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its the southern parts of the atlantic pacific and indian near antarctica
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what is the most shallow ocean
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arctic ocean
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where is the arctic ocean
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in the north surrounding the north pole
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When was earth created in relation to the solar system
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at the same time
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what is the most rapidly expanding ocean floor
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pacific
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what is the average depth of the ocean
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3800 feet
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what is the average land elevation
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<1000
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What is the lithosphere
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the outermost layer of the earth including the crust and upper mantel. it includes the techtonic plates
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what is the outer core
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its liquid metal that creates the magnetic field
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How do we know about the changes in the magnetic poles
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via ocean floor creation
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what does continetal crust float on the ocean crust
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isostasy
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What is the interaction between the lithospheric plates called and who created it
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tectonic plates by wegener
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what does divergence creat
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ocean floor formation
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what happens at convergent boundries, ocean and continetial
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subduction(trenchs) and uplifting (mountains)
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how was hawaii formed
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via a hot spot
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where is the youngest ocean crust
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at the mid ocean ridges
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where is uplifitinig now happening and what famous thing is being created
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between asia and india making the himalayas
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what was the first oceanographic expedition
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the challenger
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What is the fram expedition what did it prove and how
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fram discovered that the arctic is not a continent because it traveled the whole basin quickly
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What did matthey maury use his logs for
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as a base for the study of currents weather and climate
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what is ben franklins contribution to oceanography
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he was the first to describe the gulf streem
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what is the difference between a table mount and a seamount
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table mounts have been eroded flat while seamounts have never reached the surface
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How many times have all the continets been one mass
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more than once
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what happens to aging sea floor
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it becomes deeper and denser
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What are the layers of the earth
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three main are crust mantel and core
crust is divided into oceanic and continetial and are rigid mantel is lithosphere (rigid tectonic plates) asthenosphere (plastic) and mesospehere rigid the core is liquid on the outside and rigid on the inside |
