For hundreds of millions of years, all the land of Earth was joined together in one large mass or super continent. Scientists call it Pangaea (meaning “all lands” in Greek). Then about 200 million years ago the land began to drift apart. It broke into two pieces, and scientists have called the continent in the north Laurasia and the continent in the south Gondwanaland (named by Eduard Suess, an Austrian geologist). The two large continents continued to break apart into the smaller continents that exist today. Scientists call this movement ‘continental drift’.
The Arenal Volcano in Costa Rica
Cortical nephrons can be distinguished from juxtamedullary nephrons by: their filtration rate.
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Can causerock to break and slip apart or to change its shape.
Rivers, underground, ponds, lakes, streams, and sometimes oceans.
