Define solid.
A state of matter with a definite shape and volume due to closely packed particles.
Define liquid.
A state of matter that has a definite volume but takes the shape of its container.
Define gas.
A state of matter that has no definite shape or volume, expanding to fill its container.
True or false: Particles in a solid are tightly packed.
TRUE
True or false: Gases have a fixed volume.
FALSE
Fill in the blank: Liquids can flow because their particles are ______.
loosely packed
What happens to particles in a solid when heated?
They gain energy and vibrate more, potentially changing to a liquid.
What is a particle diagram?
A visual representation showing the arrangement and movement of particles in a substance.
Fill in the blank: In a gas, particles move ______ and are far apart.
freely
True or false: Solids can be compressed easily.
FALSE
What is the main difference between liquids and gases?
Liquids have a fixed volume, while gases do not.
Define melting.
The process where a solid turns into a liquid when heated.
Define freezing.
The process where a liquid turns into a solid when cooled.
What is evaporation?
The process where a liquid changes into a gas at its surface.
Fill in the blank: Condensation occurs when a gas turns into a ______.
liquid
True or false: Particles in a liquid are more mobile than in a solid.
TRUE
What happens to the volume of a gas when it is compressed?
The volume decreases as particles are pushed closer together.
Fill in the blank: Sublimation is when a solid turns directly into a ______.
gas
What state of matter has the most energy in its particles?
Gas
True or false: Particles in a solid can move freely.
FALSE
