7. Why does a higher temperature cause a reaction to go faster?
Either there are more collisions per second or the collisions are of greater energy.
There are more collisions per second and the collisions are of greater energy.
Collisions occur with greater energy only.
There are more collisions per second only.

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.