Midterm- Chemistry Unit 1: Properties of Matter

Mass

Mass

Amount of ‘‘stuff’’ something has

Volume

Amount of space ‘‘stuff’’ takes up

Accuracy

The measurement of how close a measurement is to the correct value

Precision

The measurement of how close a series of measurements are

Physical Property

Can be undone

Chemical property

When 1 or more substances change into something new with different properties. Can’t be undone

Filtration

Solid particles are removed from a liquid

Distillation

Separating the components from a liquid mixture by using boiling and condensation

Element

A pure substance; can not be broken down

Compund

2 or more elements that are chemically combined (bond)

Homogeneous mixture

A mixture that is uniform, of the same substance

Heterogenous mixture

A mixture that is non-uniform, things can be removed from a substance

Pure substance

Matter that is uniform and definite composition

Matter

Anything that has mass and takes up space, always in motion

Kinetic theory

Tiny particles in all forms of matter are in motion

What are the 4 signs of chemical change?

• Production of gas

• Change in temperature

• Change in color

• Formation of a precipitate

What are the 4 states of matter? Identify one key difference between them.

• Solid , atoms are compact

• Liquid, atoms are slightly separated

• Gas , atoms are separated

• Plasma, free moving electrons

Melting

Turns a solid to a liquid

Vaporization

Turns a liquid into a gas

Ionization

Turns gas into plasma

Recombination

Turns plasma into gas

Consedation

Turns gas into a liquid

Freezing

Turns a liquid into a solid

Sublimation

Turns a solid into a gas

Deposition

Turns a gas into a solid