Question

why does a balloon expand when it is heated?○ the air particles move less so they need less room○ the air particles move more so they need less room○ the air particles move less so they need more room○ the air particles move more so they need more room

Explanation:

When a balloon is heated, the air particles inside gain thermal energy, which increases their kinetic energy. This makes them move more rapidly and collide more frequently and forcefully, requiring more space to move, causing the balloon to expand.

Answer:

The air particles move more so they need more room