B - Senegal River. Borders Senegal and Mauritania
1. Which observation supported Wegener’s theory of continental drift?
<span>d. (The earth’s rotation could provide enough force to move the continents apart. )
</span>But this is not true. we know today that continents are present on the surface massive slabs called tectonic plates.
2. Which feature do you usually see when tectonic plates move apart?
b. <span>earthquakes
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3. What happens in a convection cell?
b. Cold, dense material moves horizontally, while hot, less dense material moves vertically.
1.) Polders - b.) A narrow passage of water connecting two large bodies of water.
2.) Strait - a.) A stretch of land reclaimed from the sea or a lake.
We know that the poles had changed positions in the past, because of the arrangement of the crystals in the rocks made out of metal. The crystals of the metals act like the needle of the compass when the rock is cooling off and forming, they turn into the direction of the strongest magnetic field on the Earth, which is the North Pole. So by studying the rocks that are made out of metals and see the crystals arrangement and also estimate the age of the rocks, the scientist can precisely tell how has the North Pole been moving throughout time.
