Wegener came to consider the existence of a single supercontinent from about 350 million to 245 million years ago, during the late Paleozoic Era and early Mesozoic Era, and named it Pangea, meaning “all lands.”
Answer:
A. convergent
Explanation:
"Tectonic plates" are very important when it comes to studying the Earth. It moves in different directions every year. There are particularly three types of movements or plate boundaries<em> (convergent, divergent and transform)</em>.
When the tectonic plates move away from each other, it is called <em>"divergent."</em> When they move towards each other, it is called<em> "convergent,"</em> just like what the teacher demonstrated above. <u><em>Pushing the two pieces of clay together </em></u>means<u> she's showing the movement of the tectonic plates towards each other. </u>When the plates slide past each other, it is called "transform."
Answer:
Felsic magma
Explanation:
Felsic magmas are higher in silica. The higher the amount of silica in the magma, the more viscous it is. Viscosity determines what the magma will do. Most felsic magma will stay deeper in the crust and will cool to form rocks such as granite. If felsic magma rises into a magma chamber, it may be too viscous to move and so it gets stuck. Dissolved gases become trapped by thick magma and the magma chamber begins to build pressure and felsic magmas will erupt explosively.
Answer:
The atomic weight of an atom is the sum of its protons and neutrons
Explanation:
The weight of an atom is dominated by the amount of matter contained in the dense and tiny nucleus of an atom. In the nucleus, protons and neutrons are found. Protons are massive nuclear particles that are positively charge. Neutrons are also massive and they carry no charges.
The atomic weight is given as the sum of the protons and neutrons. Electrons have little to no weight.
