P3 - Particle Model Flashcards
What is the particle model of matter?
The particle model of matter states that all matter is made up of tiny particles that are in constant motion.
True or False: Solids have a definite shape and volume.
True
Fill in the blank: In liquids, particles are _____ packed together than in solids.
less
What are the three states of matter?
Solid, liquid, and gas.
Which state of matter has particles that are far apart and move freely?
Gas
True or False: Gases have a definite volume.
False
What is the term for the change of state from solid to liquid?
Melting
What happens to the particles in a solid when it is heated?
They gain energy and vibrate more, leading to melting.
Fill in the blank: The process of a liquid turning into a gas is called _____
Evaporation
What is the term for the change of state from gas to liquid?
Condensation
True or False: In a gas, the particles are tightly packed.
False
What is the primary factor that affects the state of matter?
Temperature
Which state of matter has the highest energy level?
Gas
Fill in the blank: The process of a solid turning directly into a gas is called _____
Sublimation
What is the term for the change of state from liquid to solid?
Freezing
True or False: All substances can exist in all three states of matter.
True
What is a common example of sublimation?
Dry ice turning into carbon dioxide gas.
Fill in the blank: In a liquid, particles are _____ than in a solid but _____ than in a gas.
closer; farther
What is the effect of increasing temperature on the state of matter?
It generally causes matter to change from solid to liquid to gas.
What is density?
Density is the mass per unit volume of a substance.
How can you measure the density of an object?
By dividing its mass by its volume.
True or False: The density of a substance can change with temperature.
True
What happens to the density of most substances when heated?
It decreases.
Fill in the blank: The particles in a gas have _____ energy compared to particles in a solid.
more
What is an example of a physical change?
Melting ice.
True or False: Chemical changes involve changes in the composition of substances.
True
