This is known as a chemical change. The other kind of change in chemistry is a physical change, which is when a substance changes without becoming a new chemical. These physical changes are often ...

Scientists are still figuring out the long-term health effects of spending a lot of time in space, but decades of data show that astronauts undergo physical changes after even a brief period.

We are tracking down the soundtrack.. Matter, Matter Everywhere: How Materials Change (1970) is an 11-minute color educational film produced by Coronet Films. Aimed at introducing basic concepts in ...