# States of Matter Review

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Chapter 3 States of Matter Test Review

faster

### What determines the speed of aoms and molecules

their size and temperature

### Archimede's principle

the boyant force on an object in the fluid is equal to the weight of the displaced volume of fluid

### Viscosity

the resistance of a fluid to flow

### Solid

holds its shape without a container

### Kinetic theory implies

the higher the temperature the faster the particles move

### Law of Conservation of Mass

mass cannot be created or destroyed

### Ice floats in water because

it is less dense than water

volume

### When a fixed sample of gas increases in volume it must also

decrease in pressure and increase in temperature

### Calculation for pressure

divide force by the area over which the force is exerted

### Buoyant force

Upward force exerted on an object immersed or floating on a liquid

increases

alway in motion

### The law of conservation of energy states that

a substance has the same energy before and after a change of state

released

freezing point

### The engine of a car left running becomes hot because

energy is transferred from burning gasoline

### A substance changes from a liquid to a gas during evaporation because

energy is absorbed

### Examples of fluid

air, water, carbon dioxide

### The ability of an object to float on a a fluid is influenced by

buoyant force of a fluid, density of the object and density of the fluid

### Pascal's principle states that a contained fluid exerts pressure in what way

equally in all directions

pressure

decreases

### Gay-Lussac's Law

Law relating the temperature and pressure of gas

decreases

### Gasses are unique in comparison to solids and liquids because they

are easily compressible

increases

Gay-Lussac's Law

### Which of these properties is shared by solids, liquids and gases

their particles are in constant motion

### Why does the volume of a gas decrease when the pressure increases

Gas particles are pushed together when the pressure is increased

temperature

evaporation

freezing

liquid

### How does the density of an object that sinks into a fluid compare to the density of the fluid

the object that sinks is more dense than the fluid

states of matter

sublimation

condensation

### When a fixed sample of gas increases in volume, it must also

decrease in pressure

### What are the five changes of state

melting, freezing, evaporation, condensation and sublimation

### Solid

Particles are rigid, fixed

### Liquid

Paricles can slide past each other, but are still packed together

### Gas

Particles are in constant motion and rarely stick together

### Plasma

Particles have broken down and become ionized

### Properties of Gas

No defifinate shape or volume, expand to fill container, compressible, low density and more empty space between particles.

### Why does a duck float

the duck is less dense than the water

### When an object floats

the buoyant force is equal to the weight of the objec

### For any change of state of matter to occur

energy must be transforred

### Energy can be converted from one form to another but it CANNOT be

created or destroyed

Example: