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Physical Science Review 3

Total questions: 185

Worksheet time: 3hrs 14mins

Name
Class
Date
1.

A man jogs at a velocity of 2.5 m/s west for 1,200 s. He then walks at a velocity of 1.0 m/s east for 500 s and then stops to rest. What is the displacement of the man when he stops to rest?

a)

3,500 m west

b)

3,000 m west

c)

2,500 m west

d)

700 m west

2.

The graph below shows the motion of four cars. Based on the graph, which statement about all the cars is true?

a)

They are moving at a constant speed.

b)

They are changing their speed during travel.

c)

They are slowing down.

d)

They are stopped.

3.

A rock on Earth has a mass of 750 kg and a weight of 7,350 N. If the rock is taken into outer space, how will its mass and weight be affected?

a)

The weight and mass will remain the same because they are not altered by the effects of gravity.

b)

The weight will remain the same, but the mass will change because of the effects of gravity.

c)

The mass will be 76.5 kg, and the weight will increase because of the effects of gravity.

d)

The mass will be 750 kg, but the weight will decrease because of the effects of gravity.

4.

As the wheels of a train move along the train tracks, what type of friction exists between the wheels and the tracks?

a)

fluid friction

b)

rolling friction

c)

sliding friction

d)

static friction

5.

A child fills a bucket with salt water and sand. How are the contents of the bucket classified?

a)

a solution

b)

a compound

c)

a homogeneous mixture

d)

a heterogeneous mixture

6.

This diagram shows a 40-kg object being pulled in one direction while friction acts on it in the opposite direction. What is the net force on the object?

a)

160 N

b)

140 N

c)

120 N

d)

20 N

7.

How are the processes of melting and freezing similar?

a)

They are both processes that physically change a substance.

b)

They are both processes that chemically change a substance.

c)

They are both processes where heat is released by a substance.

d)

They are both processes where heat is absorbed by a substance.

8.

Which element is classified as a metal?

a)

boron (B)

b)

antimony (Sb)

c)

phosphorus (P)

d)

cadmium (Cd)

9.

Four different liquids will be separately poured into a single beaker. The liquids are ethanol, milk, oil, and water. The density for each liquid at room temperature is listed in the table below. How will the liquids be arranged from bottom to top in the beaker?

a)

milk, water, oil, ethanol

b)

milk, water, ethanol, oil

c)

water, milk, oil, ethanol

d)

water, oil, ethanol, milk

10.

How does a piece of paper’s ability to be folded in half compare to its ability to burn?

a)

Its ability to be folded is a physical property, while its ability to burn is a chemical property.

b)

Its ability to be folded is a chemical property, while its ability to burn is a physical property.

c)

Both are physical properties of the piece of paper.

d)

Both are chemical properties of the piece of paper.

11.

How many valence electrons are in a neutral atom of nitrogen (N)?

a)

2

b)

3

c)

5

d)

15

12.

Which represents a balanced chemical equation?

a)

CO2 + 2H2O → 2CH4 + 2O2

b)

CH4 + O2 → CO2 + H2O

c)

CH4 + 2O2 → CO2 + 2H2O

d)

CO2 + H2O → CH4 + O2

13.

Which equation represents a neutralization reaction?

a)

acid + water → salt + base

b)

acid + base → water + salt

c)

acid + salt → base + water

d)

water + base → salt + acid

14.

This unbalanced equation represents a chemical reaction: Pb(NO3)2 + NaI → NaNO3 + PbI2. What is the coefficient for NaI once the equation is balanced?

a)

1

b)

2

c)

3

d)

4

15.

This chart shows the effects of several solutions on litmus paper. Which information can be determined from the litmus paper tests?

a)

Solutions 1 and 5 are both acids.

b)

Solutions 2 and 8 are both neutral.

c)

Solutions 3 and 6 are both bases.

d)

Solutions 4 and 7 are both acids.

16.

True or false:


When a refrigerant evaporates it adds energy as heat to its surroundings

a)

True

b)

False

17.

True or false:


Visible light waves do require a medium in which to travel

a)

True

b)

False

18.

True or false


Light waves are examples of transverse waves.

a)

True

b)

False

19.

True or false:


The energy of a mechanical wave depends on the frequency of the wave.

a)

True

b)

False

20.

True or False:


As the frequency of sound waves increases, the wavelength of the sound wave decreases.

a)

True

b)

False

21.

A car is parked on a hill. In order to keep the car from rolling downhill, how great must the static friction acting on the car be?

a)

Equal to the force pulling the car downhill

b)

Greater than the force pulling the car downhill

22.

What is the unbalanced force that slows down a ball rolling across the floor?

a)

the force of friction

b)

the force fo momentum

23.

Which object has the greatest inertia?

a)

bowling ball

b)

beach ball

24.

When a moving bowling ball hits a pin, some of the ball’s momentum

a)

increases the pin's mass

b)

is transferred to the pin

25.

When air resistance balances the weight of a falling object, the velocity

a)

remains constant

b)

rapidly increases

26.

The tendency of an object at rest to remain at rest is

a)

inertia

b)

momentum

27.

___________ is a measure of the ability to do work.

a)

energy

b)

power

28.

A dropped racquetball will not return to its original position because

a)

Energy is not conserved

b)

Some of the mechanical energy is converted to nonmechanical energy

29.

The primary source of the sun’s energy is

a)

Nuclear fusion

b)

Potential energy

30.

The kind of energy associated with atomic bonds is

a)

chemical energy

b)

kinetic energy

31.

Solar panels gather ________ energy from the sun.

a)

Radiated

b)

Potential

32.

The transfer of energy as heat caused by the collision of molecules is called

a)

Conduction

b)

Contact

33.

Energy from the sun reaches the earth by

a)

Radiation only

b)

Conduction and convection

34.

Which of the following substances is the best conductor of transferring energy as heat?

a)

Water

b)

Iron

35.

Water surface waves are

a)

Longitudinal and perpendicular waves.

b)

Longitudinal and transverse waves.

36.

Waves are often caused by

a)

Vibrating objects

b)

Colliding objects

37.

The frequency of a sound wave determines

a)

The pitch of the sound

b)

How loud the sound is

38.

The color of light is determined by the ____________ of light waves.

a)

Frequency

b)

Amplitude

39.

Which device uses sound waves to view organs in the body?

a)

X-ray machine

b)

Radar

40.

The rate at which light energy flows through a given area of space is referred to as

a)

Intensity

b)

Energy

41.

A man jogs at a velocity of 2.5 m/s west for 1,200 s. He then walks at a velocity of 1.0 m/s east for 500 s and then stops to rest. What is the displacement of the man when he stops to rest?

a)

3,500 m west

b)

3,000 m west

c)

2,500 m west

d)

700 m west

42.

The graph below shows the motion of four cars. Based on the graph, which statement about all the cars is true?

a)

They are moving at a constant speed.

b)

They are changing their speed during travel.

c)

They are slowing down.

d)

They are stopped.

43.
An object with which of the following densities will float on water?
a)
0.7 g/cm3
b)
1.2 g/cm3
c)
3.5 g/cm3
d)
11.4 g/cm3
44.
A can of Coke will sink in a bowl of water.  A can of Diet Coke will float in a bowl of water.  What does this tell you about the density of the Diet Coke?
a)
it is bigger than 1
b)
it is smaller than 1
c)
it is equal to 1
d)
it is equal to -1
45.
What is the density of a liquid that has a mass of 27g and a volume of 30ml?
a)
0.9 g/ml
b)
3 g/ml
c)
57 g/ml
d)
810 g/ml
46.
Particles (molecules) in a ______________________ have more energy than the other states of matter.
a)
gas
b)
solid
c)
liquid
47.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
48.
The slower the particles in a substance move,
a)
the colder it is.
b)
the warmer it is.
c)
the more energy it has.
d)
the less energy it has.
49.
A chemical change
a)
doesn't really change much.
b)
creates a new substance
c)
is a change in the state of matter
50.
A physical change is...
a)
a change that doesn't change the identity
b)
a change that makes something new.
c)
a chemical reaction
51.
All matter is made of 
a)
energy 
b)
atoms 
c)
air
d)
chemistry
52.
The positive particles of an atom are 
a)
electrons 
b)
atoms
c)
neutrons 
d)
protons 
53.
The central region of an atom where its neutrons and protons are is called the
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
54.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
55.
How many neutron are in the atom "K"?
a)
7
b)
2
c)
39
d)
20
56.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
57.
What is the atomic mass of "F," Fluorine?
a)
9
b)
18
c)
17
d)
19
58.
How many the electrons does "Al," aluminum, have?
a)
5
b)
10
c)
13
d)
3
59.
When an atom loses a valence electron, it becomes a_____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
60.
Negative ions form when atoms _________ valence electrons.
a)
lose
b)
gain
c)
share
61.

What property of this wave is represented by the letter "A"

a)

amplitude

b)

crest

c)

trough

d)

wavelength

62.
What property of the wave is represented by the letter "B"?
a)
amplitude
b)
crest
c)
trough
d)
wavelength
63.
Kinetic energy can be calculated using the formula   KE = 1/2mv2.  What is the kinetic energy of a bicycle that has a mass of 20 kg and is traveling at a velocity of 10 m/sec?  
a)
10 J
b)
100 J
c)
1000 J
d)
10,000 J
64.
What is the formula for kinetic energy? 
a)
KE = mgh
b)
KE = 2mv2
c)
KE = 1/2mv2
d)
KE = mv2
65.
What is the formula for gravitational potential energy? 
a)
GPE = mgh
b)
GPE = 2mv2
c)
GPE = 1/2mv2
d)
GPE = mv2
66.
An 8kg dog chases a cat. if the dog has 400J of kinetic energy. What is the speed of the dog?
a)
10 m/s
b)
5 m/s
c)
1 m/s
d)
100 m/s
67.
Which group of the periodic table is composed of inert (not reactive)  gases?
a)
alkali metals
b)
alkaline earth metals
c)
halogens
d)
noble gases
68.
Which is an alkali metal?
a)
Magnesium
b)
Iron
c)
Sodium
d)
Europium
69.
Which is not a property of metals? 
a)
Brittle
b)
Loses Electrons
c)
Ductile
d)
Highly reactive with water
70.
Which is not a property of nonmetals? 
a)
Gains Electrons
b)
Not reactive
c)
Highly Reactive with Water
d)
Brittle
71.
Which are properties of families? 
a)
Valence electrons increase
b)
Number of outer shells increase
c)
Changing properities
72.
Which are properties of periods? 
a)
Valence electrons increase
b)
Outer shells increase
c)
Similar chemical and physical properties
73.
Which of the following is the correct formula for magnesium and chlorine?
a)
Mg2Cl
b)
MgCl
c)
MgCl2
d)
Mg2Cl2
74.
Name the compound MgF2
a)
magnesium fluoride
b)
manganese Phosphide
c)
magnesium(III) fluoride
d)
magnesium fluoride(II)
75.
iron(II) oxide
a)
FeO
b)
FeO2
c)
Fe2O
d)
Fe2O2
76.
Pb(NO3)2
a)
Lead nitrate
b)
Lead (II) nitrate
c)
Lead nitrite
d)
Lead (I) nitrate
77.
Which way is the object moving?
a)
left
b)
right
c)
down
d)
up
78.
Newton's First Law of Motion states that objects will keep moving until
a)
they run out of gas
b)
acted upon by another force
c)
the end of time
79.
A small, hot star near the end of its life is a star called a
a)
white dwarf
b)
red dwarf
c)
supergiant
d)
protostar
80.
a star that expands and cools once it runs out of hydrogen
a)
pulsar
b)
black hole
c)
red giant
d)
supernova
81.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
82.
What it the formula to find voltage. 
a)
I= V/R
b)
R=V/I
c)
V= I x R 
83.
An electric circuit in which different parts of the circuit are on separate branches.
a)
Parallel circuit 
b)
Series circuit 
c)
Open circuit 
d)
Closed Circuit 
84.
An electric circuit in which all parts are connected one after another along on path.
a)
Series circuit 
b)
Parallel circuit 
c)
Open circuit 
d)
Closed Circuit 
85.
What extends around a charged object?
a)
Static Electricity
b)
Electric Current
c)
Electric Field
d)
Power
86.

The 6 step process that scientists use to answer questions or solve problems is called ?

a)

Experiment

b)

Scientific method

c)

Analyzing data

d)

Testing a hypothesis

87.

Which step of the scientific method involves gathering prior knowledge and doing research about the problem/topic?

a)

Draw conclusions

b)

State the problem

c)

Gather information

d)

Form hypothesis

88.

Which step of the scientific method includes forming an educated guess as to how to solve the problem?

a)

Draw conclusions

b)

State the problem

c)

Gather information

d)

Form hypothesis

89.

Which step of the scientific method would the scientists state whether his/her hypothesis was correct?

a)

Draw conclusions

b)

Analyze data

c)

Gather information

d)

Form hypothesis

90.

Another name for the “test hypothesis” step is ?

a)

Analyze Data

b)

Hypothesis

c)

Experiment

d)

Step-by-step procedure

91.

If a scientist finishes the steps of the scientific method but his/her hypothesis was incorrect, what would be the next step?

a)

Restate the problem

b)

Analyze the data more

c)

Test hypothesis again

d)

Form a new hypothesis

92.

If a scientist finishes the steps of the scientific method and his/her hypothesis was correct, what would be the next step?

a)

Restate the problem

b)

Restate the problem

c)

Test hypothesis again

d)

Form a new hypothesis

93.

Which variable is controlled and tested by the scientist?

a)

Dependent variable

b)

Independent variable

c)

Experimental variable

d)

Controlled variable

94.

What is the measured variable of an experiment?

a)

Dependent variable

b)

Independent variable

c)

Experimental variable

d)

Controlled variable

95.

The group in an experiment that receives the independent variable is known as the ?

a)

Experimental group

b)

Independent group

c)

Control group

d)

Placebo group

96.

The group in an experiment that DOES NOT receive the independent variable is known as the ?

a)

Experimental group

b)

Independent group

c)

Control group

d)

Placebo group

97.

Holding a marble at the top of a ramp

a)

Potential

b)

Kinetic

98.

A slinky moving down a set of stairs

a)

Potential Energy

b)

Kinetic Energy

99.

Kinetic Energy is

a)

energy that matter has because of its position

b)

energy that matter has because of its motion

100.

What energy is stored and waiting to be used?

a)

Kinetic Energy

b)

Potential Energy

101.

A kid at the top of a sledding hill has more _______ energy than at the bottom.

a)

Potential Energy

b)

Kinetic Energy

102.

Potential energy depends on the ________ and ________ of the object.

a)

Height (position)

b)

Mass

c)

Speed

d)

Friction

103.

Which point has the most potential energy?

a)

G

b)

F

c)

B

d)

A

104.

At which point of the roller coaster is potential energy the greatest?

a)

W

b)

X

c)

Y

d)

Z

105.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
106.
What is energy?
a)
rate of work
b)
Motion of an object
c)
ability to do work
d)
force over time
107.

Kinetic energy depends on the ________ and ________ of the object.

a)

Height (position)

b)

Mass

c)

Speed

d)

Friction

108.

This is a force that moves a roller coaster car down the tracks.

a)

push

b)

magic

c)

gravity

d)

slide

109.
Where is potential energy the GREATEST on a roller coaster?
a)
At the bottom of the first hill
b)
At the top of the first hill
c)
Half way down the first hill
110.
Where is kinetic energy the LEAST on a roller coaster?
a)
At the bottom of the first hill
b)
At the top of the first hill
c)
Halfway down the first hill
111.
What force caused your cart to slow down?
a)
friction
b)
applying force
c)
gravity
d)
gravity and friction
112.

What is the unit for mass?

a)

kilogram (kg)

b)

meter (m)

c)

Newton (N)

d)

Joule (J)

113.

What is the unit for distance?

a)

kilogram (kg)

b)

meter (m)

c)

Newton (N)

d)

Joule (J)

114.

What is the unit for energy?

a)

kilogram (kg)

b)

meter (m)

c)

Newton (N)

d)

Joule (J)

115.

What is the formula for kinetic energy?

a)

distance / time

b)

mass x acceleration

c)

velocity / time

d)

½(mass) x (velocity)2

e)

(mass) x (acceleration of gravity) x (height)

116.

What is the formula for gravitational potential energy?

a)

distance / time

b)

mass x acceleration

c)

velocity / time

d)

½(mass) x (velocity)2

e)

(mass) x (acceleration of gravity) x (height)

117.

What are the two types of electricity?

a)

Static and electrons

b)

Current and voltage

c)

Series and parallel

d)

Static and current

118.

Voltage is the measure of the...

a)

difference in electrical energy between 2 parts of a circuit

b)

amount of electric charge that flows through a circuit

119.

What type of circuit is this?

a)

Series

b)

Parallel

c)

Simple

120.

If the current in an electrical circuit is constant, what will happen to the voltage if the resistance is increased?

a)

Voltage will increase

b)

Voltage will decrease

c)

Voltage will stay the same

121.

If you increase the voltage across a resistor, what will happen to the current?

a)

Current will increase

b)

Current will decrease

c)

Current will stay the same

122.

If you increase the size of the resistor and keep the voltage the same, what will happen to the current?

a)

Current will increase

b)

Current will decrease

c)

Current will stay the same

123.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
124.
What is voltage measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
125.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
126.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
127.
How do you calculate current
a)
Resistance X Voltage
b)
Voltage X Resistance
c)
Resistance ÷ Voltage
d)
Voltage ÷ Resistance
128.
How do you calculate resistance?
a)
Voltage X Current
b)
Current ÷ Voltage
c)
Voltage ÷ Current
d)
Current X Amps
129.

An example of an insulator of electricity is.....

a)

Rubber

b)

Silver

c)

Iron

d)

Copper

130.

A material that allows electricity to flow through the circuit without disruption is known as a _______________.

a)

Switch

b)

Transformer

c)

Conductor

d)

Source

131.

An example of a conductor of electricity is.....

a)

Rubber

b)

Copper

c)

Glass

d)

Plastic

132.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

133.
Melting a chocolate bar?
a)
Physical Change
b)
Chemical Change 
134.

Wood that is burning in a brush pile has heat, and produces ashes.

a)

Physical

b)

Chemical

135.

The picture is an example of _____________.

a)

freezing

b)

evaporation

c)

condensation

d)

melting

136.

Molecules in a solid look like:

a)
b)
c)
d)
137.

What Is Matter?

a)

Anything That has mass and takes up space.

b)

Anything that you can see or taste.

c)

What you can touch.

d)

you and go throught this.

138.
What phase change occurs due to a release of heat energy?
a)
melting
b)
condensation
c)
evaporation
d)
boiling
139.
The man takes the hot pot off the stove with his bare hands and his hands get burned.  This is an example of 
a)
conduction
b)
convection
c)
radiation
140.
The baby chickens are kept warm from the heat lamps. This demonstrates what kind of heat transfer? 
a)
conduction
b)
convection
c)
radiation
141.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
142.
M&M's is an examples of a
a)
homogeneous mixture
b)
heterogeneous mixture
143.

A solution is a special mixture formed when one substance is _____________evenly throughout the other.

a)

Dissolved

b)

Disappearing

c)

Spread Out

d)

Put

144.
the substance to be dissolved in a liquid
a)
solute
b)
solvent
c)
dissolve
d)
mixture
145.
Solutions are a type of mixture.  What makes solutions different from other mixtures is....
a)
The elements in a solution react to compounds
b)
One substance dissolves in the other
c)
Two or more substances are combined
d)
There is a chemical change when combined
146.

What is this?

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

147.
What is the range of pH values in an acidic solution?
a)
0-6
b)
8-14
c)
15-239058204958
d)
pH = 7
148.
If the pH of a solution is 9, it is a....
a)
acid
b)
base
c)
both
d)
none
149.
Which of the following substances is basic?
a)
Apple juice
b)
Ginger ale
c)
Baking soda
d)
Distilled water
150.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
151.
what does the 6 represent?
a)
Atomic mass
b)
atomic number
c)
chemical symbol
d)
element name
152.
Which is a neutron?
a)
A
b)
B
c)
C
153.
Which of these is a property of metals?
a)
It's malleable
b)
It can't conduct electricity
c)
They are used in food
d)
It's very brittle
154.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
155.
Which elements are found on the right side of The Periodic Table?
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Water
156.
a)

Metal

b)

Nonmetal

c)

Metalloid

157.
Which of the following is a transition metal? 
a)
Iron
b)
Oxygen
c)
Neon
d)
Barium
158.
Which of the following is a Halogen? 
a)
Bromine
b)
Rubidium
c)
Argon
d)
Beryllium
159.

Which color on the image of the periodic table corresponds with the noble gases.

a)

red

b)

black

c)

blue

d)

orange

160.

Scientists rely on their five senses to

a)

Draw conclusions.

b)

Develop hypotheses.

c)

Make observations.

d)

Pose questions.

161.

The drawings below represent four different forms of electromagnetic energy. Which diagram represents electromagnetic energy with the shortest wavelength?

a)

A

b)

B

c)

C

d)

D

162.

Which diagram best shows the property of refraction?

a)

A

b)

B

c)

C

d)

D

163.

Skiers often wear sunglasses while they are skiing because snow

a)

radiates light

b)

conducts light

c)

absorbs light

d)

reflects light

164.

Which changes in energy form are illustrated in the diagram?

a)

electrical → sound → light and mechanical

b)

mechanical → light → sound and electrical

c)

sound → mechanical → light and electrical

d)

light → electrical → mechanical and sound

165.

X-rays are an example of

a)

Longitudinal waves

b)

Surface waves

c)

Electromagnetic waves

166.

Using the vacuum pump, air is removed from the jar until there is no air left. When there is no air in the jar, the sound of the bell can no longer be heard. This happens because

a)

sound can not travel without air

b)

the electricity can not flow without air

c)

the bell can not vibrate without air

d)

the rubber seal is too thick

167.

When placed in direct sunlight, which object will absorb the most visible light energy?

a)

a piece of clear glass

b)

a snowball

c)

a shiny mirror

d)

a black sweater

168.

Liquid water changes to water vapor during which process?

a)

Dissolving

b)

Evaporation

c)

Melting

d)

Condensation

169.

The tiny particles that make up all matter are called

a)

Genes

b)

Minerals

c)

Atoms

d)

Cells

170.

Which scientific model could be used to predict the properties of an element?

a)

closed loop system

b)

Punnett square

c)

Periodic Table

d)

water cycle chart

171.

Which graph best represents the relative distance between the particles of most substances in their solid, liquid, and gas states?

a)

A

b)

B

c)

C

d)

D

172.

A wet shirt is put on a clothesline to dry on a sunny day. The shirt dries because water molecules

a)

gain heat energy and condense

b)

gain heat energy and evaporate

c)

lose heat energy and condense

d)

lose heat energy and evaporate

173.

As ice cream melts, its molecules

a)

absorb heat energy and move farther apart

b)

absorb heat energy and move closer together

c)

release heat energy and move farther apart

d)

release heat energy and move closer together

174.

A substance freezes at 50oC and boils at 275oC. At which temperature would this substance be a liquid?

a)

–100°C

b)

80°C

c)

–50°C

d)

375°C

175.

When carbon and oxygen combine chemically, the mass of the product is

a)

greater than the mass of the carbon plus the mass of the oxygen

b)

equal to the mass of the carbon plus the mass of the oxygen

c)

equal to the mass of the carbon

d)

less than the mass of the carbon

176.

Which of these substances are elements?

a)

hydrochloric acid and carbonic acid

b)

carbon dioxide and water

c)

oxygen and helium

d)

water and oxygen

177.

Water vapor changes to liquid water during which process?

a)

Dissolving

b)

Evaporation

c)

Melting

d)

condensation

178.

If the unequal and opposing forces are applied to the cart at the same time, what will occur?

a)

The cart will move to the left.

b)

The cart will move to the right.

c)

The cart will alternate between moving to the left and the right.

d)

The cart will remain stationary.

179.

What law can you use to calculate the acceleration of the bag?

a)

Newton's first law of motion (inertia)

b)

Newton's second law of motion (F=ma)

c)

Newton's third law of motion (action/reaction)

d)

the law of universal gravitation

180.

What is the net force on the bag?

a)

5 N

b)

90 N to the right

c)

105 N to the left

d)

120 N

181.

A car travels a distance of 180 km. This trip takes 3 hours. What is the average speed of the car?

a)

60 kilometers per hour

b)

540 kilometers per hour

c)

60 miles per hour

d)

Cannot be calculated from the information given

182.

When two equal forces act in opposite directions on an object, they are called

a)

Friction forces

b)

Balanced forces

c)

Centripetal forces

d)

Gravitational forces

183.

Which graph below shows an object slowing down?

a)

A

b)

B

c)

C

d)

D

184.

At which position does the boulder have the greatest kinetic energy?

a)

A

b)

B

c)

C

d)

D

185.

A person uses a bow to shoot an arrow at a target. In which diagram does the bow and arrow have the greatest amount of potential energy?

a)

A

b)

B

c)

C

d)

D

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