We need to ____ a liquid to change it into a gas. This process is called ____. When we cool down a gas, it will ____ into a liquid. Condensation is a process ____ to evaporation. If you heat up a ____, it will ____ into a liquid. If you want to change a ____ back into a solid, you need to ____. It is called ____.

Changes of states of matter - fill in the gaps

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