Module 2: Chemistry-Properties and States of Matter

Question 1

Compound

Answer 1

A pure substance that contains two or more elements chemically joined in a fixed proportion.

Question 2

Mixture

Answer 2

Two or more substances mixed together but not chemically bonded.

Question 3

Elements

Answer 3

A pure substance that cannot be broken down into a simpler substance and contains only one type of atom.

Question 4

Molecules

Answer 4

The smallest unit of a chemical compound composed of two or more atoms bonded together.

Question 5

Atoms

Answer 5

The smallest chemical unit of an element.

Question 6

Homogeneous Mixture

Answer 6

The mixture appears to contain only type of substance because the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another.

Question 7

Heterogeneous Mixture

Answer 7

Means the substances in the mixture are different from another.

Question 8

Pure Substances

Answer 8

Matter that cannot be separated into any other substance and always has the same composition.

Question 9

Solvent

Answer 9

The substance in a solution in which the solute dissolves.

Question 10

Solute

Answer 10

The substance in a solution that gets dissolved.

Question 11

Plasma

Answer 11

This fourth phase of matter exists where temperatures reach millions of degrees Celsius.

Question 12

Solution

Answer 12

A homogeneous mixture made by dissolving one substance in another.

Question 13

Conductivity

Answer 13

The ability of a substance to allow heat & electricity to flow through it.

Question 14

Diffusion

Answer 14

The natural (passive) movement within gases and liquids that spreads out particles from an area of higher concentration to an area of lower concentration.

Question 15

Density

Answer 15

The ratio of a substance’s mass to it’s volume.