What evidence of a chemical reaction might you see in the following cases?
* bleaching a stain
* burning a match.
*rusting of an iron nail

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.