Hot spots are weak spots in the asthenosphere that: a. Are plumes of hot mantel material from the Asthenosphere, that burns through the moving lithosphere / crust, and makes volcanoes.
b. Have higher temperature magma.
c. Are places where ocean crust subducts.
d. Are places in the earth that divide when the weather is warm.

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean

Why is the melting of ice a physical change ?

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as