Answer:
The particles in a solid are tightly packed and locked in place. Although we cannot see it or feel it, the particles are moving or vibrating in place.
Answer:
If anything but H2O were found, it would be evidence of a chemical change. Therefore, 4 is the only viable evidence that it was a physical change of H2O liquid to H2O gas.
False, pepsin and hydrochloric acid
To try to get attention, it's not safe and you can get sent to the hospital. People think it's a joke, it's really not.
An average quality lawn captures 4 times the carbon output of a typical gasoline-powered mower.
