If u answer these questions make them 1 sentinse each
1. explain the difference between the zone of
aeration and the zone of saturation.
2. why is it easier for water to flow through rock
and sediment with larger pores than through rock
and sediment with smaller
pores?
3. how does a cavern differ from a cave?
4. which two factors determine how easily water is
able to move through rock or sediment?
5. how do water and carbon dioxide contribute to the
formation of karst topography?

b a mature ovary of a plant.

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.