Life on earth
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Asthenosphere | Plasticlike layer of Earth on which the lithospheric plates float and move around.
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| Continental drift | Wegener's hypothesis that all continents were once connected in a single large landmass that broke apart about 200 million years ago and drifted slowly to their current positions.
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| Convection current | Current in Earth's mantle that transfers heat in Earth's interior and is the driving force for plate tectonics.
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| Lithosphere | Rigid layer of Earth about 100 km thick, made of the crust and a part of the upper mantle.
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| Pangaea | Large, ancient landmass that was composed of all the continents joined together.
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| Plate | A large section of Earth's oceanic or continental crust and rigid upper mantle that moves around on the asthenosphere.
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| Plate tectonics | Theory that Earth's crust and upper mantle are broken into plates that float and move around on a plasticlike layer of the mantle.
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| Seafloor spreading | Hess's theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
kyu
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