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


X-axis of a graph


y-axis of a graph


A graph consists of a ______ set up by two lines

Equal units

Each line, or axis is divided into ____________


When you graph recorded data, you look for a __________


Scientists often work with gas temperatures in units called _______


To convert celsius degrees to kelvins, you add ___


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?


Pressure and volume are related when temperature is kept ________


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


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 __________________


The change in state from a solid to a liquid


The change of state from a liquid to a solid


The change from liquid water into water vapor

A liquid gains enough energy to become a gas

Vaporization occurs when ______________


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


The opposite of vaporization

Gas particles lose enough thermal energy to become a liquid

Condensation occurs when _____________


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


Below 0'C, water exists in its _____ state


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


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


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

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