# Reading Checks pgs. 249, 251 & bolded terms

### 17 terms by annabananacheez

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### How is a solid different from a liquid in shape and volume?

solid keeps its shape, liquid molds to shape of container

### How are liquids and gases similar in shape and volume?

liquids & gases mold to shape of container and are always moving

### How are liquids and gases different in the amount of space between particles?

gases move faster

### How does the behaviour of particles change as energy is added to them? How does the behaviour change as energy is lost?

heat- faster; less heat- less fast

### How does the space between particles change as energy is added to them? How does the space change as energy is lost?

-molecules move faster
-more space between
energy lost
-molecules move slower
-more compact, dense
- less space between

### What is the difference between a model and a theory?

A model in science is a way to think about
and interpret natural events and objects. A theory provides a scientific
explanation based on the results of experimentation.

### What happens to matter when its temperature increases?

An increase in the temperature of matter generally results in a decrease in its density, with the exception of water

Less density

### What is the difference between heat and temperature?

Heat is heat transfer, or how quickly energy moves.

Temperature is the potential for energy transfer.

### condensation

a reaction between two or more organic molecules leading to the formation of a larger molecule and the elimination of a simple molecule such as water or alcohol.

### evaporation

matter or the quantity of matter evaporated or passed off in vapor.

### expansion

an expanded, dilated, or enlarged portion or form of a thing

### mass

the quantity of matter as determined from its weight

### melting

to have a solid melt into a liquid by increasing the temperature

### solidification

to change from a liquid to a solid form

### sublimation

the state of a solid changing directly into a gas

### volume

the amount of space, measured in cubic units, that an object or substance occupies.

Example: