Follow Melting, Freezing and Condensing

Track water's state before and after a change.

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Name the starting state and the ending state. Melting changes solid to liquid; freezing changes liquid to solid; evaporation changes liquid to gas; condensation changes gas to liquid.

Worked example

An ice cube becomes liquid water as it melts. The substance is still water even though its state and shape have changed.

Three containers show a regular closely packed solid, an irregular closely spaced liquid at the bottom, and widely spaced gas particles throughout the container. — Particle arrangements help model states of matter; the dots are not drawings of actual particle sizes.

Would you believe it?

Some pumice can float! Gas-filled spaces can make this volcanic rock less dense overall than water.

USGS: rocks that float

Question 1 An ice cube becomes a puddle. Which change occurred? Freezing Melting Condensation

Question 2 Liquid water becomes solid ice in a freezer. What is this called? Freezing Evaporation Melting

Question 3 A small puddle dries as water enters the air as a gas. Which process describes this? Condensation Freezing Evaporation

Question 4 Water vapor in the air forms liquid drops on a cool surface. Which change occurred? Melting Condensation Freezing

Question 5 Which statement correctly describes water vapor? It is water in the gas state It is always a visible solid It is a different element from water

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