Chapter 1

Question 1

Building blocks of matter

Answer 1

Atoms

Question 2

Made of the same kind of atom

Answer 2

Element

Question 3

Made up of two or more different kinds of elements

Answer 3

Compound

Question 4

Can be observed without changing a substance into another substance

Answer 4

Physical properties

Question 5

Can only be observed when a substance is changed into another substance

Answer 5

Chemical properties

Question 6

Are independent of the amount of the substance that is present

Answer 6

Intensive properties

Question 7

Depend upon the amount of the substance present

Answer 7

Extensive properties

Question 8

These are changes in matter that do not change the composition of a substance

Answer 8

Physical changes

Question 9

Chemical changes result in new substances

Answer 9

Chemical changes

Question 10

Solid substances are separated from liquids and solutions

Answer 10

Filtration

Question 11

Uses differences in the boiling points of substances to separate a homogeneous mixture into its components

Answer 11

Distillation

Question 12

Separates substances on the basis of differences in solubility in a solvent

Answer 12

Chromatography

Question 13

Measure of the average kinetic energy of the particles in a sample

Answer 13

Temperature

Question 14

Density formula

Answer 14

D=m/v

Question 15

Significant figures rules;
Zeroes at the beginning of a number:

Answer 15

Never significant

Question 16

Significant figures rules;
Zeros at the end of a number:

Answer 16

Significant if a decimal point is written in the number

Question 17

Significant figures rules;
Addition and subtraction:

Answer 17

Answers are rounded to the least significant decimal place

Question 18

Significant figures rules;
Multiplication and division:

Answer 18

Answers are rounded to the number of digits that corresponds to the least number of significant figures

Question 19

Th proximity of a measurement to the true value of a quantity

Answer 19

Accuracy

Question 20

The proximity of several measurements to each other

Answer 20

Precision

Question 21

Conversions formula

Answer 21

Given unit * desired unit/given unit = desired unit