Question text
21 A substance consists of particles that are close together and moving past each other at random. The average speed of the particles is gradually increasing. What best describes the substance? A a gas being heated B a liquid being heated C a liquid undergoing solidification D a solid being heated
21 A substance consists of particles that are close together and moving past each other at random.
The average speed of the particles is gradually increasing.
What best describes the substance?
A a gas being heated
B a liquid being heated
C a liquid undergoing solidification
D a solid being heated
Select your answer: