Question

2. Ice being heated will go through chnges of state, in order from _______ to _______ to _______, which are all ______ changes.

fill in the blanks.

Answer 1

Solid; Liquid; Gas: Physical

Answer 2

There are actually times when it will go directly from solid (ice) to gas (water vapor). This process is called sublimation, and is why ice sometimes disappears from sidewalk in winter, even if it never gets above the freezing point.