Roughly 71 percent of Earth's<span> surface is covered by </span>water<span>, most of it in the oceans. About a fifth of </span>Earth's<span> atmosphere is made up of oxygen, produced by plants. While scientists have been studying our planet for centuries, much has been learned in recent decades by studying pictures of </span>Earth<span> from </span><span>space. Hope that helps :)</span>
The <em>Acadians</em> ... who came from the French-speaking <em>Acadiana</em> region in
Canada, navigated all the way down the east coast of the US, around Florida,
and then for some mysterious and eternally inexplicable reason decided to settle
on the Gulf Coast of Louisiana, generally between Nawlins and Lak Charlie ...
soon became addressed by the locals there as " <em>Cajuns</em> ".
Both plates are folded into mountain ranges
The main reason why the tectonic plates move is the conversational currents. There is magma between the upper mantle and the asthenosphere that heats up at the upper mantle. The weight is so small that the magma rises with the help of these conversational currents. When the magma has ascended towards the asthenosphere, it has nowhere to go so the magma lies along the asthenosphere. There the magma cools down again because the asthenosphere is colder than the upper mantle, which makes the magma heavier and goes back down to the upper mantle, where the magma heats up again and everything starts all over again and so it goes on over and over again. Scientists have concluded that the earth's gravity causes two other processes that also cause the tectonic plates to move.
Ridge push - in the spreading zones, the sides of the tiles are raised and slide to the side as in a slide.
Slab pull - when a plate is pulled down by gravity in a subduction zone like an anchor.
