Why do object expand?

Answer 1

Objects contract or expand depending on the temperature. Cold makes things contract, heat makes things expand. However, there are some exceptions. For example, water expands when it turns to ice. This is due to the process of crystallization.

The reason that objects expand and contract is found at the atomic level. When an object is warm, its molecules move faster and spread out, making that object expand. However, when an object is cold, the atoms slow down and move back together, making the object contract.

Answer 2

Matter expands and contracts because the molecules rearranged depending on heat applied to it. When it is hot, the molecules scatter around more. When it is cold, the molecules clump together. It's kinda like in real life. When your hot, you run around cause its hot and when it's cold, you are stable and probably huddle withe other people(sort of like penguins in winter).

Answer 3

heat makes it expand by the molecule move very swiftly by the heat. Then it makes it the substance bigger.

Answer 4

things expand when they are hot and contract when they are cold, much like the sking on your arm. :)

Answer 5

The atoms within the object move fasterand bounce off each other at a greater rate causing them to be spread out

Answer 6

The particle movement causes it to expand or contract which is caused by the various temperatures

Answer 7

Temperature!! Heat causes the medium (matter of sort) to expand, and cold causes it to contract. Hence why you need cold temperature for gases to become liquids.

Answer 8

Depends on how cool or how hot