Ch. 15 Vocab

Question 1

Chemical change

Answer 1

A change from one substance to another.

Question 2

Chemical property

Answer 2

A characteristic of a substance that indicates whether it can undergo a certain chemical change.

Question 3

Colloid

Answer 3

A type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.

Question 4

Compound

Answer 4

A substance in which the atoms of two of more elements are combined in a fixed proportion.

Question 5

Distillation

Answer 5

The process for separating substances in a mixture by evaporating a liquid and recondensing its vapor.

Question 6

Element

Answer 6

If all the atoms in a substance have the same identity.

Question 7

Heterogeneous mixture

Answer 7

A mixture in which different materials can be distinguished easily.

Question 8

Homogeneous mixture

Answer 8

It contains two or more gaseous, liquid, or solid substances blended evenly throughout.

Question 9

Law of conservation of mass

Answer 9

The mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change.

Question 10

Physical change

Answer 10

A change in size, shape, or state of matter.

Question 11

Physical property

Answer 11

Any characteristic of a material that you can observe without changing the the identity of the substance that make up the material.

Question 12

Solution

Answer 12

A homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of their container.

Question 13

Substance

Answer 13

A substance is a type of matter with a fixed composition.

Question 14

Suspension

Answer 14

It is a heterogeneous mixture containing a liquid in which visible particles settle.

Question 15

Tyndall effect

Answer 15

A scattering of light by colloidal particles.