States of Matter
What is a state of matter that has a definite volume but no definite shape?
Liquid.
____ ___ is the temperature that liquid boils.
Boiling point.
The ____ is a measure of the average speed of particles in a substance.
Temperature.
What happens when liquid freezes?
The particles slow and take fixed positions.
Viscosity is the inward force among the molecules of a liquid.
Surface tension.
Vaporation is the reverse of condensation.
True.
The ___ of a gas is the force of its outward push divided by the area of the walls of its container.
Pressure.
What is it called when the surface particles of a gas form a solid.
Sublimation.
An amorphous solid has a definite melting point.
Crystalline.
What two processes both happen at the surface of a substance?
Evaporation and sublimation.