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What is matter made of?
Small particles
How do particles move in a solid?
Vibrate in fixed positions
Which state of matter has particles far apart and moving quickly?
Liquid
Gas
Solid
Plasma
What does the particle model help us understand?
The behavior of solids liquids and gases
What happens to particles during melting?
They gain energy and move more freely
Which state has a fixed shape and volume?
Plasma
Solid
Liquid
Gas
What happens to particles when a substance is heated?
They move faster and spread apart
What phase change turns a liquid into a gas?
Solidification
Evaporation
Melting
Condensation
What does a diagram of a boiling substance show?
Both liquid and gas particles
What happens to particles in a gas?
They move freely and randomly
What is expansion?
Increase in particle spacing due to heating
What causes a substance to contract?
Cooling
Why do hot fluids rise?
They become less dense due to expansion
What is the reverse of melting?
Condensation
Boiling
Solidification
Evaporation
How many states exist at the melting point?
Two
Which state of matter is easily compressed?
Liquid
Gas
Plasma
Solid
