Lesson 1

Question 1

It is the study of the properties and behavior of matter. It is central to our fundamental understanding of many science-related fields.

Answer 1

Chemistry

Question 2

It is anything that has mass and takes up space.

Answer 2

Matter

Question 3

These are the building blocks of matter.

Answer 3

Atoms

Question 4

Each ______ is made of a unique kind of atom.

Answer 4

Element

Question 5

It is made of two or more different kinds of elements.

Answer 5

Compounds

Question 6

What are the two methods of classification?

Answer 6

State of Matter and Composition of Matter

Question 7

What are the three states of matter?

Answer 7

Solid, liquid, and gas.

Question 8

What are the four classifications of matter?

Answer 8

Homogeneous mixture, Heterogeneous mixture, Elements, and Compound

Question 9

It has distinct properties and a composition that does not vary from sample to sample.

Answer 9

Substance

Question 10

What are the two types of substance?

Answer 10

Elements and Compounds

Question 11

It is a substance which can not be decomposed to simpler substances.

Answer 11

Element

Question 12

It is a substance which can be decomposed to simpler substances.

Answer 12

Compound

Question 13

Compounds have a definite composition. That means that the relative number of atoms of each element that makes up the compound is the same in any sample. This is The Law of Constant Composition or The Law of Definite Proportions. True or False?

Answer 13

True

Question 14

It exhibits the properties of the substances that make them up. It can vary in composition throughout a sample (heterogeneous) or can have the same composition throughout the same (homogeneous).

Answer 14

Mixtures

Question 15

Another name for the homogeneous mixture.

Answer 15

Solution

Question 16

What are the four types of properties?

Answer 16

Physical properties, Chemical properties, Intensive properties, and Extensive properties

Question 17

It can be observed without changing a substance into another substance.

Answer 17

Physical properties

Question 18

It can only be observed when a substance is changed into another substance.

Answer 18

Chemical properties

Question 19

These properties are independent of the amount of the substance that is present.

Answer 19

Intensive properties

Question 20

These properties depend upon the amount of the substance present.

Answer 20

Extensive properties

Question 21

What are the two types of changes?

Answer 21

Physical changes and Chemical changes

Question 22

This are changes in matter that do not change the composition of a substance. It is also the conversion between the three states of matter in a physical change.

Answer 22

Physical changes

Question 23

This changes result in new substances.

Answer 23

Chemical changes

Question 24

Mixtures can be separated based on physical properties of the components of the mixture. What are some of the methods used to separate mixtures?

Answer 24

Filtration, Distillation, and Chromatography

Question 25

This type of method in separating a mixture uses differences in the boiling points of the substances to separate a homogeneous mixture into its components.

Answer 25

Distillation

Question 26

It is one of the methods in separating a mixture by separating the solid substances from the liquid and solution.

Answer 26

Filtration

Question 27

This technique separates substances on the basis of differences in the ability of substances to adhere to the solid surfaces.

Answer 27

Chromatography

Question 28

Is a measure of the amount of material in an object. SI uses the base unit, and the metric system uses the gram as the base unit.

Answer 28

Mass

Question 29

Is a measure of distance. The meter is the base unit.

Answer 29

Length

Question 30

What is the most commonly used metric unit for volume?

Answer 30

Liter (L) and Milliliter (mL)

Question 31

It is considered the "hotness and coldness" of an object that determines the direction of heat flow.

Answer 31

Temperature

Question 32

It is a physical property of a substance. It has units that are derived from the units for mass and volume.

Answer 32

Density

Question 33

The formula for density.

Answer 33

D = m/V

Question 34

This are number that are counted or given by definition.

Answer 34

Exact

Question 35

These are numbers that depends on how they were determined.

Answer 35

Inexact or measured

Question 36

It refers to the proximity of a measurement to the true value of a quantity.

Answer 36

Accuracy

Question 37

It refers to the proximity of several measurements to each other.

Answer 37

Precision

Question 38

It refers to the digits that were measured.

Answer 38

Significant figures