# Solids, liquids, and gases part 2

### 34 terms by Tigerdoglover

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### Graphs

Diagrams that tell how two variables, or factors, are related

### Horizontal

X-axis of a graph

### Vertical

y-axis of a graph

### Grid

A graph consists of a ______ set up by two lines

### Equal units

Each line, or axis is divided into ____________

### Relationship

When you graph recorded data, you look for a __________

### Kelvins

Scientists often work with gas temperatures in units called _______

### 273

To convert celsius degrees to kelvins, you add ___

### Kelvin

The ______ temperatures will be used to graph the data

### Directly proportional

When a graph of two variables is a straight line passing through the (0,0) point, the relationship is linear and the variables are said to be_______________

### The volume of a gas is directly proportional to it's Kelvin temperature under constant pressure

What does the graph of charles's law show?

### Constant

Pressure and volume are related when temperature is kept ________

### Inversely

When a graph of two measurements forms a curve which slopes downward from left to right, and the curve is steep close to the horizontal axis, the relationship is nonlinear and the measurements are said to vary ________ with each other

### The pressure of a gas varies inversely with it's volume at constant temperature

What does the graph for boyle's law show?

### Thermal energy

The energy that particles of a substance have

### Heat

Thermal energy is transferred from one substance to another as ______

### From a warmer substance to a cooler substance

Thermal energy always flows ___________

### Increases or decreases by a sufficient amount

A substance changes state when its thermal energy __________________

### Melting

The change in state from a solid to a liquid

### Freezing

The change of state from a liquid to a solid

### Vaporization

The change from liquid water into water vapor

### A liquid gains enough energy to become a gas

Vaporization occurs when ______________

### Boiling

Takes place inside a liquid as well as at the surface

### Boiling point

Temoerature at which a liquid boils

### How strongly the particles of a substance are attracted to each other

The boiling point of a liquid depends on _______________

### Air pressure

As you go up in elevation, __________ decreases

### Condensation

The opposite of vaporization

### Gas particles lose enough thermal energy to become a liquid

Condensation occurs when _____________

### Sublimation

Occurs when the surface particles of a solid gain enough energy to become a gas

### Data bank

Chemists have built up a _________ of information about the properties of a substance

### Solid

Below 0'C, water exists in its _____ state

### Liquid

Water must be a _______ before it's temperature can rise above 0'C

### Gas

When more energy is added to liquid water at 100'C, molecules become a ___

### 100'C

Water must be it's gas stat before it's temerature can rise above _______

Example: