What does it mean when something melts?
It changes from solid to liquid.
At what temperature does ice melt?
At zero degrees Celsius. (32 degrees Fahrenheit)
How do the particles from a solid differ from those in a liquid?
Solid particles are held more closely and firmly together, keeping a rigid shape. Liquids' particles have more energy and move around more freely, etc.
What happens when a liquid gets boiled?
It bubbles and turns into gas.
How does liquid evaporate?
It slowly heats without boiling and vaporizes.
How does a blow dryer get your hair dry?
Heat transfer, evaporation, etc.
How does condensation form on windows, glasses, etc.?
Water vapor in the air comes into contact with a cooler glass surface and condenses, or turns into a liquid, which clings to the surface.
How do the particles of a gas change when they are cooled?
They lose energy, slow down, come closer together, and may even change state.
What would happen if you put a plastic bottle full of water in the freezer? Why does this happen?
It will freeze, expand, and burst the bottle. Water is different from other matter: its particles make special patterns when they freeze.
Name the three states of matter and two changes of state.
Solid, liquid, gas. Evaporation, condensation, melting, freezing, etc.
