Hydrogen can be found in many things. It cannot be broken down to create something else. An example of something like hydrogen is oxygen. We call things like hydrogen or oxygen _ .

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Why are pipes bursting in the in extremely cold weather?

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.