Chapter 2, Lesson 1

Question 1

Variables

Answer 1

Factors of elements on the experiment that effect the result.

Question 2

Variables can be:

Answer 2

Controlled. Dependent, of independent.

Question 3

Controlled Variables (cause)

Answer 3

Factors that are different (cause)

Question 4

Only one independent variable per experiment:

Answer 4

Controlled Variable

Question 5

What is the responding variable?

Answer 5

Dependent

Question 6

Dependent variable

Answer 6

Something that might be affected by change in the independent variables.

Question 7

What I Change

Answer 7

Independent Variable

Question 8

What I Observe

Answer 8

Dependent Variable

Question 9

What I Keep the Same

Answer 9

Controlled Variable

Question 10

Matter

Answer 10

Anything that has mass and occupies space

Question 11

Atom

Answer 11

The basic particle which all elements are made

Question 12

Chemistry

Answer 12

The study of the properties of matter and how matter changes.

Question 13

Chemical Bond`

Answer 13

The force that holds atoms together

Question 14

Substance

Answer 14

A single kind of matter that is pure and has a specific set of properties.

Question 15

Molecule

Answer 15

A neutral particle made of 2 or more atoms joined by covalent bonds.

Question 16

Physical property

Answer 16

A characteristic of pure substance that can be observed without changing it into another substance

Question 17

Compound

Answer 17

A pure substance made of two or more elements chemically combined.

Question 18

Chemical formula

Answer 18

A combination of symbols that represents the elements made of two or more elements chemically combined

Question 19

Element

Answer 19

A pure substance that cannot be broken down into other substances by chemical of physical means.

Question 20

Chemical formula

Answer 20

A combination of symbols that represents the elements in a compound and their proportions.

Question 21

Mixture

Answer 21

2 or more substances that are mixed together but not chemically combined.

Question 22

Heterogeneous mixture

Answer 22

A mixture in which pure substances are unevenly distributed throughout the mixture.

Question 23

Homogeneous mixture

Answer 23

A mixture on which substances are evenly distributed throughout the mixture.

Question 24

Solution

Answer 24

A a well mixed mixture containing a solvent and at least one solute that has the same properties throughout.