Tutor profile: Karmen V.
What mechanisms drive plate tectonics?
Plate tectonics is driven by a few mechanisms. One is mantle convection, in which the solid-state flowing of the mantle moves the overlying lithospheric plate. Another mechanism is slab pull, which refers to the weight of a subducting slab pulling the rest of the slab down into the mantle under the force of gravity. The final major driver of plate tectonics is spreading zones, or mid oceans ridges, which push the plates on either side of the ridge away as they spread.
In a scientific paper, what is the purpose of the abstract?
The purpose of an abstract is to sum up the whole paper into a concise paragraph. It helps the reader decide if the information in the paper is useful to them. The abstract should briefly touch on each section of the paper.
Why are elements with even atomic numbers more abundant in the Universe than elements with odd atomic numbers?
Elements with even atomic numbers are more abundant because an element's nucleus is more stable when each nucleon is paired up, meaning each neutron is paired to a proton.
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