Respuesta :
Answer:
makes it expand
Explanation:
the hot water heats up the air in the bottle and makes it expand. (Gases always expand when they're warm - the heat gives the gas energy to spread out more). The expanding gas blows up the balloon.
Answer:
makes it expand
Explanation:
the hot water heats up the air in the bottle and makes it expand. (Gases always expand when they're warm - the heat gives the gas energy to spread out more). The expanding gas blows up the balloon.