Point a is the same distance from the epicenter as point b. using what you know about the movement of waves, how would you
expect the seismic waves to be different at point a and point b?
a.
the waves would be exactly the same at points a and b.
b.
the waves would be larger at point a than at point b.
c.
the waves would arrive at point b before they arrived at point a.
d.
the ground would shake up and down at point a but back and forth at point b.

age range would be the answer

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.