Physical Science Exam

Front 1

The first step in the scientific method is usually?

Back 1

Making an observation

Front 2

The force that with which gravity pulls on a quantity of matter is referred to as

Back 2

Weight

Front 3

Which unit is used to measure the height of the bookcase

Back 3

Meters

Front 4

How many significant figures are in 7.357

Back 4

4

Front 5

Scientist test a hypothesis by

Back 5

Doing experiments

Front 6

You are asked to find the volume of a cube that is 2.5 cm high, 2.65 cm wide and 3.456 cm long. How many significant figures sure you show in your answer

Back 6

Two

Front 7

The two main branches of science are

Back 7

Physics and chemistry

Front 8

A molecule of water is made from – – – – combining two hydrogen atoms and one oxygen atom

Back 8

Chemically

Front 9

The chemical formula for water, means that each water molecule contains?

Back 9

Two hydrogen atoms and one oxygen atom

Front 10

How many Adams are in a single molecule of Fe2O3?

Back 10

Five

Front 11

Which of the following is an element?

Back 11

Iron

Front 12

Diamonds are known for its

Back 12

Hardness

Front 13

Which of the following causes a chemical change

Back 13

Lighter than air

Front 14

Which of the following causes a chemical change?

Back 14

Burning

Front 15

A chemical change occurs whenever

Back 15

A new substances formed

Front 16

Which of the following is a physical change?

Back 16

A.) dissolving

B.) evaporating

C.) bending

D.) all of the above👈🏽

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Front 17

Matter is defined as anything that

Back 17

Has mass and takes up space

Front 18

A substance has a mass of 360 g and a volume of 7.5 mL. What is its density.

Back 18

360. 48 g/mL

-----

7.5

Front 19

Temperature is A measure of the average --------- Energy of the particles of an object

Back 19

Kinetic

Front 20

The heavier a particle, the – – – it moves

Back 20

Slower

Front 21

The resistance of a fluid to flow is referred to as

Back 21

Viscosity

Front 22

The change of a substance from a solid directly to gas is called

Back 22

Sublimation

Front 23

The law of conservation of mass states that mass cannot be

Back 23

Created or destroyed

Front 24

Ice floats in water because it is

Back 24

Less dense than water

Front 25

All matter is made of Adams in molecules that are

Back 25

Always in motion

Front 26

The temperature at which a substance changes from a liquid to a solid is

Back 26

Freezing point

Front 27

Which of the following is not a fluid

Back 27

Wood

Front 28

According to modern atomic Theory, it is nearly impossible to determine an electrons exact

Back 28

Position

Front 29

Valence electrons determine an Atoms

Back 29

Chemical properties

Front 30

A mole is an SI base unit that describes the

Back 30

Amount of a substance

Front 31

A subatomic particle that has a negative charge is called a

Back 31

Electron

Front 32

Thompson has made his theory about the atom during the experiment using a

Back 32

Cathode Rays

Front 33

Thompson is responsible for discovering that an atom contains....

Back 33

Electrons

Front 34

What is an Atoms nucleus made of

Back 34

Protons and neutrons

Front 35

Who's model determined that an atoms positive charge is concentrated and atoms center?

Back 35

Rutherford's

Front 36

Avogadro's number is useful for

Back 36

Counting atoms

Front 37

Charge of an Atom is?

Back 37

Neutral

Front 38

And elements atomic number is equal to the number of its

Back 38

Protons

Front 39

Atoms of elements that are in the same group have the same number of

Back 39

Valence electrons

Front 40

Which of the following elements is an alkali metal

Back 40

Sodium

Front 41

In Mendeleev's periodic table, elements in each column have similar…

Back 41

Properties

Front 42

How was Mendeleev's periodic table arranged

Back 42

Increasing atomic mass

Front 43

What is Mendeleev know for?

Back 43

Publishing the first periodic table

Front 44

Each column of the periodic table is

Back 44

A group

Front 45

Elements that belong to the same group have the same number of

Back 45

Valence electrons

Front 46

Atoms that gain or lose electrons are called

Back 46

Ions

Front 47

The three main groups of elements are metals, nonmetals, and

Back 47

Semiconductors

Front 48

Most elements are

Back 48

Metals

Front 49

Most elements on the left side of the periodic table are

Back 49

Metals

Front 50

Which element is a semiconductor

Back 50

Silicon

Front 51

Elements that are found in the same group have the same number of

Back 51

Valence electrons

Front 52

In which type of bond do atoms share electrons

Back 52

Covalent bond

Front 53

The anion formed from an oxygen atom is called

Back 53

Oxide ion

Front 54

Which of the following is a compound

Back 54

Salt

Front 55

Atoms and ions are held together by

Back 55

Chemical bonds

Front 56

Atoms sometimes form bonds to

Back 56

Become more stable

Front 57

An ionic compound of calcium and chlorine would be named

Back 57

Calcium chloride

Front 58

A covalent compound made of one sulfur and two oxygen atoms would be named

Back 58

Sulfur dioxide

Front 59

The chemical formula for the ionic compound for aluminum and chlorine is

Back 59

AlCl3

Front 60

The substance that is formed in a chemical reaction is called a

Back 60

Product

Front 61

A type of reaction that produces an increases in temperature

Back 61

Exothermic

Front 62

In a balanced equation the mass of the reactant is equal to the

Back 62

Mass of the product

Front 63

Substances that slow reactions are called

Back 63

Inhibitors

Front 64

Substance that undergoes a change in achemical reaction is a

Back 64

Reactant

Front 65

Which of the following is an example of a decomposition reaction

Back 65

Digestion

Front 66

A chemical equation is balanced by changing or adding

Back 66

Coefficient

Front 67

A chemical equation is balanced by changing or adding

Back 67

Coefficient

Front 68

What could you do to make yeast dough rise more slowly

Back 68

Reduce the temperature

Front 69

A chemical equation is balanced by changing or adding

Back 69

Coefficient

Front 70

What could you do to make yeast dough rise more slowly

Back 70

Reduce the temperature

Front 71

An enzyme it's a special kind of catalyst that works too

Back 71

Speed of a specific biochemical reaction

Front 72

An enzyme it's a special kind of catalyst that works too

Back 72

Speed of a specific biochemical reaction

Front 73

A solution that is mildly acidic but have a pH of approximately

Back 73

Six

Front 74

The label on a bottle indicates that the subject inside has a pH of 13. This tells you that the substances is

Back 74

Strongly basic

Front 75

The label on a bottle indicates that the subject inside has a pH of 13. This tells you that the substances is

Back 75

Strongly basic

Front 76

A base forms which ions in solution

Back 76

Hydroxide

Front 77

The label on a bottle indicates that the subject inside has a pH of 13. This tells you that the substances is

Back 77

Strongly basic

Front 78

A base forms which ions in solution

Back 78

Hydroxide

Front 79

Which solution is the most acidic

Back 79

Apple juice, pH = 3

Front 80

The label on a bottle indicates that the subject inside has a pH of 13. This tells you that the substances is

Back 80

Strongly basic

Front 81

A base forms which ions in solution

Back 81

Hydroxide

Front 82

Which solution is the most acidic

Back 82

Apple juice, pH = 3

Front 83

A ------ is a substance that produces H+ ions in a water solution

Back 83

Acids

Front 84

A ----- is a substance that produces OH- ions in a solution

Back 84

Base

Front 85

– – - – – measures how acidic or basic a substance is

Back 85

pH

Front 86

------- changes color in the in the presence of an acid or a base

Back 86

Indicator

Front 87

------- changes color in the in the presence of an acid or a base

Back 87

Indicator

Front 88

A bitter taste and a slippery feel are clues that a solution is probably a

Back 88

Base

Front 89

------- changes color in the in the presence of an acid or a base

Back 89

Indicator

Front 90

A bitter taste and a slippery feel are clues that a solution is probably a

Back 90

Base

Front 91

The formula HCl stands for

Back 91

Hydrochloric acid

Front 92

------- changes color in the in the presence of an acid or a base

Back 92

Indicator

Front 93

A bitter taste and a slippery feel are clues that a solution is probably a

Back 93

Base

Front 94

The formula HCl stands for

Back 94

Hydrochloric acid

Front 95

Which of the following is a homogeneous mixture

Back 95

Rubbing alcohol

Front 96

An oatmeal raisin cookie is an example of a

Back 96

Heterogeneous mixture

Front 97

An oatmeal raisin cookie is an example of a

Back 97

Heterogeneous mixture

Front 98

The type of nuclear radiation that can penetrate farthest through matter is called

Back 98

Gamma rays

Front 99

An oatmeal raisin cookie is an example of a

Back 99

Heterogeneous mixture

Front 100

The type of nuclear radiation that can penetrate farthest through matter is called

Back 100

Gamma rays

Front 101

What hold protons and neutrons together in a nucleus

Back 101

Strong nuclear force