Lesson 1

Question 1

chemistry

Answer 1

The science of the materials that make up the universe - what they are made of, how they interact, and how they change.

Question 2

matter

Answer 2

Substance that has mass and takes up space.

Question 3

solid

Answer 3

A form of matter that has a definite shape and volume.

Question 4

liquid

Answer 4

A form of matter that goes not have a definite shape but has a definite volume. A liquid conforms to the shape of its container.

Question 5

gas

Answer 5

A form of matter that has no definite shape, weight, or size. The volume (size) of a gas is related to its temperature and the pressure being place on it by its environment.

Question 6

plasma

Answer 6

A hot gas whose matter is broken into charged particles. Plasma exists in areas of extreme heat, like the center of stars.

Question 7

atom

Answer 7

The smallest form of matter (which cannot be cut into different pieces). Atoms are made up of a number of smaller particles, the most important of which are protons, neutrons, and electrons.

Question 8

element

Answer 8

A specific form of matter composed of only one type of atom. Elements cannot be divided into different types of matter. Elements are classified by the number of protons in an atom of that element.

Question 9

compound

Answer 9

Two or more elements combined chemically. The compound has different chemical properties than those of its individual elements, and it can only be separated by chemical means.

Question 10

mixture

Answer 10

Two or more elements that are combined physically rather than chemically. The initial elements retain their own chemical properties and can be separated by physical means.