1.4: Melting, freezing, and subliming

The change of state from solid to liquid is called .................

• melting

• freezing

• boiling

When a solid melts its particles gain energy and move out of their regular pattern.

• True

• False

When a solid melts Its particles ........................ energy.

• lose

• gain

When a solid melts the particles overcome the attraction force and start to move around, in and out of each other.

• True

• False

The temperature at which a substance melts is its .......................

• melting point

• sublimation point

• boiling point

Every substance has its own melting point.

• True

• False

Melting points are used to Identify substances.

• True

• False

Melting points are used to tell us about the purity of a substance.

If a substance has a sharp melting point, it is ............................ substance.

• an impure

• a pure

Melting points are used to tell us about the purity of a substance.

If a substance melts over a range of temperatures, ......................................................

• it is a mixture of substances.

• a pure substance.

The change of state from liquid to solid is called ...............

• melting

• freezing

• boiling