Quiz about Physical Science final 3.0

Question 1

Which variable is changed on purpose in an experiment?

Accepted Answer

Independent variable

Answer

Dependent variable

Answer

Controlled variable

Answer

Random variable

Question 2

What is the main difference between a physical change and a chemical change?

Accepted Answer

Physical change alters appearance, not composition

Answer

Physical change alters composition, chemical change alters appearance

Answer

Chemical change alters appearance, not composition

Answer

Physical change creates new substances

Question 3

Why is it important to keep controlled variables constant in an experiment?

Accepted Answer

To ensure a fair test

Answer

To change the outcome

Answer

To increase the number of variables

Answer

To make the experiment more difficult

Question 4

Which of the following best describes a homogeneous mixture?

Accepted Answer

Evenly mixed (solution)

Answer

Unevenly mixed

Answer

Ionized gas, found in stars

Answer

Definite shape and volume

Question 5

What is a precipitate?

Accepted Answer

Solid formed from a chemical reaction in a liquid

Answer

Starting substance in a chemical reaction

Answer

Substance formed as a result

Answer

Combination of substances not chemically bonded

Question 6

Which term describes the starting substance in a chemical reaction?

Accepted Answer

Reactant

Answer

Product

Answer

Precipitate

Answer

Law

Question 7

A product in a chemical reaction is:

Accepted Answer

The substance formed as a result

Answer

The starting substance

Answer

The solid formed in a liquid

Answer

The combination of substances not chemically bonded

Question 8

What does the term "accuracy" refer to in scientific measurements?

Accepted Answer

How close to true value

Answer

How consistent results are

Answer

How fast a measurement is taken

Answer

How many measurements are made

Question 9

According to the Law of Conservation of Mass, what happens to matter during a chemical reaction?

Accepted Answer

Matter cannot be created or destroyed

Answer

Matter is always created

Answer

Matter is always destroyed

Answer

Matter changes into energy

Question 10

What is the difference between atomic number and mass number?

Accepted Answer

Atomic number is the number of protons; mass number is protons plus neutrons

Answer

Atomic number is protons plus neutrons; mass number is number of protons

Answer

Atomic number is the number of electrons; mass number is protons plus electrons

Answer

Atomic number is the number of neutrons; mass number is protons plus electrons

Question 11

How do you find the number of neutrons in an atom?

Accepted Answer

Subtract atomic number from mass number

Answer

Add atomic number and mass number

Answer

Subtract number of electrons from protons

Answer

Add number of protons and electrons

Question 12

Who discovered electrons using a cathode ray?

Accepted Answer

J.J. Thomson

Answer

Rutherford

Answer

Bohr

Answer

Dalton

Question 13

If an atom has an atomic number of 8 and a mass number of 16, how many neutrons does it have?

Accepted Answer

8

Answer

16

Answer

24

Answer

0

Question 14

How did Mendeleev arrange the periodic table?

Accepted Answer

By atomic mass

Answer

By atomic number

Answer

By electron configuration

Answer

By chemical properties

Question 15

Which of the following best describes a cation?

Accepted Answer

Positively charged ion (lost electrons)

Answer

Negatively charged ion (gained electrons)

Answer

Neutral atom

Answer

Ion with both positive and negative charges

Question 16

According to the octet rule, why do atoms bond?

Accepted Answer

To achieve 8 electrons in their outer shell

Answer

To lose all their electrons

Answer

To become radioactive

Answer

To increase their mass

Question 17

Which of the following is the correct way to balance a chemical equation?

Accepted Answer

Use coefficients to ensure the same number of each atom on both sides.

Answer

Change the subscripts of the compounds.

Answer

Add more reactants to the equation.

Answer

Remove products from the equation.

Question 18

What does the term "half-life" refer to in nuclear chemistry?

Accepted Answer

The time it takes for half of a radioactive substance to decay.

Answer

The time it takes for a substance to double in mass.

Answer

The time it takes for a chemical reaction to complete.

Answer

The time it takes for a nucleus to split.

Question 19

What is the formula for force?

Accepted Answer

F = ma

Answer

F = mv

Answer

d/t

Answer

W/t

Question 20

What is absolute zero?

Accepted Answer

The temperature where all motion stops (0 K)

Answer

The temperature where water freezes

Answer

The temperature where ice melts

Answer

The temperature of boiling water

Question 21

How does sound travel?

Accepted Answer

In waves, needs a medium, speed depends on material

Answer

In waves, does not need a medium

Answer

In straight lines, needs no medium

Answer

In circles, speed is always the same

Question 22

Which of the following is a property of longitudinal waves?

Accepted Answer

Compression and rarefaction

Answer

Crest and trough

Answer

Amplitude and frequency only

Answer

Only wavelength

Question 23

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

Accepted Answer

the mass is the same

Answer

the product is doubled

Answer

the product is half the mass of the reactants

Answer

the mass changes depending on the reaction

Question 24

The red numbers in the image below represent ________

Accepted Answer

coefficients

Answer

subscripts

Answer

I don't know, and don't want to try

Answer

None of the answers are correct

Question 25

The substances at the beginning of a chemical equation are called the ____

Accepted Answer

reactants

Answer

product

Answer

yield

Answer

chemical symbol

Question 26

What is the right part of a chemical equation called...

H_{2 +}O₂ --> H₂O

Accepted Answer

Products

Answer

Reactants

Answer

Yields

Answer

Chemical Equation

Question 27

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

Accepted Answer

coefficient

Answer

charge

Answer

subscript

Answer

random number

Question 28

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Al + __O₂--> __Al₂O₃

Accepted Answer

4,3 --> 2

Answer

4,1 --> 2

Answer

4,3 --> 4

Answer

3,4 --> 1

Question 29

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H₂ + __S --> __H₂S

Accepted Answer

1,1 --> 1

Answer

2,2 --> 2

Answer

1,2 --> 1

Answer

1,2 --> 2

Question 30

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CH₄ + __O₂ --> __CO₂+ __H₂O

Accepted Answer

1,2 --> 1,2

Answer

2,1 --> 2,1

Answer

1,2 --> 1,1

Answer

1,2 --> 2,1

Question 31

Which is true of ionic compounds?

Accepted Answer

They are made of metals and nonmetals

Answer

They are electrically neutral when dissolved in a solution

Answer

They are made by sharing electrons

Answer

They are good conductors as solids

Question 32

A negatively-charged ion.

Accepted Answer

anion

Answer

atom

Answer

cation

Answer

electron

Question 33

Cations are

Accepted Answer

positive

Answer

negative

Answer

on the right side of the periodic table.

Answer

nonmetals

Question 34

Na⁺and S ^-2

Accepted Answer

Na2S

Answer

NaS2

Answer

Na2S2

Answer

NaS

Question 35

K ⁺ and N^-3

Accepted Answer

K3N

Answer

KN

Answer

KN3

Answer

K3N3

Question 36

The chemical formula for an ionic compound of potassium and oxygen is

Accepted Answer

K2O.

Answer

KO.

Answer

K2O2.

Answer

KO2.

Question 37

When naming ionic compounds, the cation is always named first and the anion is always named second.

Accepted Answer

True

Answer

False

Question 38

Li2O

Accepted Answer

Lithium oxide

Answer

Dilithium oxideDilithium oxide

Answer

Lithium dioxide

Question 39

CsCl

Accepted Answer

Cesium Chloride

Answer

Monocesium monochloride

Answer

Cesium monochloride

Physical Science final 3.0

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science