vocab
random
200

Who discovered and had the theory of  seafloor spreading?

Henry Hess 

300

What is the average height of the troposphere?

about 12 km

400

what is liquefaction?

the process by which soil loses strength and acts as a liquid instead of a solid

400

At what latitude do polar easterlies rise to the upper troposphere where they cause a high pressure area 

60 degrees 

500

what percent of the dead sea is made up of sodium chloride?

30 %

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