If Jason came outside again a few hours later, what would the stars in Canis Major look like? O A. The pattern of stars would appear to be in the same place in the sky.

B. The pattern would change because each star would have moved in a different direction.

O C. The pattern of stars would appear to have moved together across the sky.

D. The pattern would be smaller because the stars moved closer together.

the answers are a and c

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.