It's a gas! Air consists of nitrogen and oxygen and lots of empty space.
Why does blowing on hot soup help to cool it off? The answer is evaporation.
Used coffee grounds can be recycled to make air filters that remove methane, a powerful greenhouse gas, from the atmosphere.
Salt absorbs water vapor from surrounding air and sometimes partially liquifies and clumps together in the process.
Despite weighing tons, clouds seem to free-float in the air. How do the billowy marvels stay up in the sky?
It may sound paradoxical, but warm spells and flurries often go hand in hand.
If salts are constantly washing into rivers, lakes and oceans, why aren't inland lakes salty as well?
A listener wrote to A Moment of Science about a fascinating phenomenon she noticed when heating water for tea in a microwave oven...
You are heating up water and see bubbles form on the bottom of the pan. Is the water considered to be boiling?
Doesn't heat rise and aren't mountaintops often damp and cold? Learn more on this Moment of Science.