Chapter 15

Question 1

chemical change

Answer 1

A change of one substance to another.

Question 2

chemical property

Answer 2

A characteristic of a substance that indicates whether it cam 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 or more elements are combined in a fixed proportion

Question 5

distillation

Answer 5

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

Question 6

element

Answer 6

If all atoms in a substance have the same identity. (the substance is an element)

Question 7

heterogeneous mixture

Answer 7

A mixture in which different materials can be distinguished easily.

Question 8

homogenous mixture

Answer 8

Contains 2 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

solution

Answer 11

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

Question 12

physical property

Answer 12

Any characteristic of a material that you can observe without changing the indentity of the substances that make up the material.

Question 13

substance

Answer 13

A type of matter with a fixed composition.

Question 14

suspension

Answer 14

A heterogenous mixture containing a liquid in which visible particles settle.

Question 15

Tyndall effect

Answer 15

The scattering of light by colloidal particles.