Why is snow soft and ice hard?

Answered by Alex DeSmet, Meteorologist, National Weather Service, Pocatello This is a good question, because snow and ice are both water in a frozen form. So, why do they feel so much different to us? Well, the answer is actually fairly simple, and it has to do with air. As snowflakes fall to the ground and…

If molecules in colder things get denser, why does ice float?

Answered by Flint Hall, Hydrogeologist, Idaho Department of Environmental Quality Water is the most important chemical to life on earth and perhaps anywhere else in the universe. A chemical is a substance with a specific composition (or ingredients). The most basic chemicals are atoms of elements. These elements can combine to form molecules with specific…