It is unchanged and can be used again for the same chemical reaction.
is the answer
Answer: density
Convection is the circular cycle of rising and falling of a liquid or gas as it becomes hotter or cooler. When a liquid or gas becomes hotter, its density decreases, which causes the substance to rise. After rising, the substance loses heat and becomes cooler, which increases its density. This causes the substance to fall or sink to the bottom.
Independent, dependent, and controlled variables.
Theory of plate tectonics hun because of convection currents the plates move
