164k views
3 votes
Why do most materials get smaller when they cool

User Michal W
by
7.7k points

2 Answers

3 votes
because the molecules that make them up move closer together and become more compact
User Justin Swartsel
by
6.9k points
2 votes
Because the molecules that make them get closer, and more compact. Making the object smaller
User Tho Quach
by
7.1k points