jueves, 22 de enero de 2015

WEATHER VS. CLIMATE


Weather forecast

How heavy is air?


We use some instruments to predict the weather. One of the most important is barometer. It allows us to measure atmospheric pressure. Let's know more about how it was invented...
Test what you have learned about the barometer



You might be interested on Tornados? Watch this video to see how tornados are formed.
To check you knowledge about tornados, do this test.

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