# Science- solids, liquids,gases

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### shape or volume

The states of matter are defined by whether or not they hold their __ or __.

### solid

A __ has a definite shape and a definite volume.

### because the particles are packed tightly and stay in place

Why does a solid have a definite shape and definite volume?

### motionless

Particles in a solid are not completely __. Instead, they vibrate.

### slightly

Particles in a solid move back and forth __.

### crystals

Many solids contain particles that form a regular, repeating pattern which form __.

### crystalline solids

Solids that are made up of crystals are called __.

### sugar and salt

Two examples crystalline solids are __ and __.

### melting point

Crystalline solids melt at a specific temperature called its __.

### amorphous

Solids whose particles are not arranged in regular patterns are called __solids.

### plastics and rubbers

Two examples of amorphous solids are __ and __

### Amorphous

__ solids do not melt when heated, instead they become softer.

### They get softer

What happens when amorphous solids are heated?

### plastic

The word __ means "able to be molded into many shapes".

### liquid

A __ has no definite shape but has a definite volume. It takes the shape of its container.

### liquids

Particles in __ are packed closely, but are able to move freely

### it means they can flow from place to place.

What does it mean when we say liquids are "fluid"?

### viscosity

The resistance of a liquid to flow is called __.

### slowly

Liquids with high viscosity flow __.

### quickly

Liquids with low viscosity flow __

### syrup

An example of a liquid with high viscosity is __

### vinegar

An example of a liquid with low viscosity is __

### volcanic eruptions

The viscosity of lava helps in classifying ___

### gas

A __ takes the shape and volume of its container.

### gas

__ particles spread apart and move at high speeds in all directions.

### volume

__ is the amount of space matter fills.

### the volume of its container

Because gases fill their containers, the volume of a gas is the same as__ .

### temperature

__ is a measure of the average energy of motion of the particles of a substance.

### The faster the particles are moving, the higher the temperature shown.

Why can it be said that a thermometer can be thought of as a speedometer for molecules?

### is the force of its outward push divided by the area of the walls of the container

The pressure of a gas is the __ divided by __.

### Force divided by area (f/a)

What is the formula for finding pressure?

### firmness

The __ of an object inflated with gas comes from the pressure of the gas

### high pressure to an area of low pressure

Gases flow from an area of __ to an area of __

### Robert Boyle

__ was an English scientist who did experiments with gases.

### decreases

Robert Boyle found that when the pressure of a gas is increased, the volume of the gas __.

### increase

Robert Boyle found out that when the pressure is decreased, the volume will __.

### Boyle's law

The relationship between the pressure and volume of a gas is called __

### pressure

Boyle's law also applies in the opposite way - when the volume of a gas decreases, the __ will increase.

### increases

When the temperature of a gas is increases, the pressure of the gas __.

### decreases

When the temperature is decreased, the pressure __

### If the tires get hot, the pressure in the tire will increase. The tire could pop if pressure isn't released.

Why do truck drivers have to monitor and adjust tire pressure on long trips?

### Jacques Charles

A French scientist named __ studied the relationship between the temperature and volume of a gas.

### volume

Jacques Charles found that when the temperature of a gas increases, its __ increases.

### temperature

Jacques Charles found that when the __ decreases, its volume decreases

### Charles' Law

___ states that when the temperature of a gas increases, its volume increases. When the temperature decreases, its volume decreases

Example: