What is a possible pH level of acid rain?
7.0
10.5
6.9
4.3

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.

Fred is studying a substance that is made out of only one element. this means that