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Physc + Chem GED Prep Exam DEC

Total questions: 100

Worksheet time: 3hrs 20mins

Name
Class
Date
1.

Which of the pictures below shows a balanced representation of

H2 + O2 → H2O?

a)
b)
c)
d)
2.

What is the left part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical equation

3.

How many Mn atoms are found in the following compound?

2MnO4

a)

1

b)

2

c)

4

d)

8

4.

Which of the following equations are correctly balanced?

a)

12CO2 + H2O ---> C6H12O6 + O2

b)

CO2 + H2O ---> 3C6H12O6 + O2

c)

CO2 + 9H2O ---> C6H12O6 + O2

d)

6CO2 + 6H2O ---> C6H12O6 + 6O2

5.

In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?

a)

Mg and O

b)

Mg and MgO

c)

MgO

d)

O and MgO

6.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
7.

What law governs the balancing of chemical equations?

a)

Law of Energy

b)

Law of Conservation of Matter/Mass

c)

Law of Gravity

d)

Law of Matter Movement

8.

How many Hydrogen atoms in 3(NH₄)₂CrO₄?

a)

4

b)

2

c)

8

d)

24

e)

9

9.
Balance this equation:
P4+O2  -->  P2O3
a)
3 P4+ O2 --> 2 P2O3
b)
 P4+ O2 --> 2 P2O3
c)
 P4+ 3 O2 --> 2 P2O3
d)

 P4 + O2 --> P4O2

10.
Which term means speed with a direction?
a)
Speeding
b)
Acceleration
c)
Velocity
d)
Gravity
11.
The Standard Units for Speed is ?
a)
m/s (meters per second)
b)
ms (meters times seconds)
c)
mskg (meters times seconds kilograms)
d)
m/s*kg (meters per second kilograms)
12.
What are the two variables that determine momentum?
a)
speed and height
b)
mass and velocity
c)
car and truck
d)
momentum and distance
13.
If an object decreases its speed each second it moves before stopping, it is...
a)
conserving momentum
b)
insane
c)
accelerating
d)
conserving energy
14.
This motorcyclist just experienced which one of newton's laws? (the one that fits best)
a)
Inertia: object in motion stays in motion unless acted on by a force
b)
F = ma
c)
Action - Reaction: for every action there is an opposite and equal reaction.
d)
4th law
15.

Match the graph to the description:

"The car is slowing down."

a)
b)
c)
d)
16.
Which of the following is a unit of distance ?
a)
miles/hr
b)
hr
c)
km
d)
min
17.
Which of the following is a unit of time?
a)
km/hr
b)
hr
c)
km
d)
mi
18.
What is the equation to calculate distance?
a)
distance = speed/time
b)
distance = time/speed
c)
distance = speed/distance
d)
distance = speed x time 
19.

The force that opposes motion because of resistance between bodies in contact

a)

Tension

b)

Applied

c)

Friction

d)

Spring

20.

The force that exists between all objects

     with mass

a)

Gravity

b)

Nuclear

c)

Air resstance

d)

Electrostatics

21.

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

a)
b)
c)
d)
22.

What is the net force?

a)

40 N left

b)

0 N Balanced

c)

400 N right

d)

40 N right

23.

Object's tendency to resist change

a)

Friction

b)

Inertia

c)

Force

d)

Gravity

24.

Newton's __________________ says that the Net Force on an object is directly related to the objects acceleration.

a)

First Law (Inertia)

b)

Second Law (F = ma)

c)

Third Law (Action-Reaction)

d)

Law of Universal Gravitation

25.
Force = Mass x Acceleration
How much force is needed to accelerate a 130 pound runner at 2 m/sec?
a)
9800 N
b)
2000 N
c)
260 N
d)
65 N
26.
What Unit do we Measure Force in? 
a)
Newtons
b)
Joules
c)
Force
d)
Don't know
27.
What is the name for a push or pull?
a)
A movement
b)
A force
c)
Speed
d)
Density
28.
If an object mass =30 Kg on the Earth, what would be it's weight on Earth?
a)
30 N
b)
300 kg
c)
3000N
d)
300 N
29.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
30.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
31.

Your mass is 90 kg on Earth. What would your MASS be on Planet Whiteley, which has three times as much gravity as on Earth?

a)

270 kg

b)

180 kg

c)

90 kg

d)

30 kg

32.

A bicycle has a momentum of 24 kg•m/s. What momentum would the bicycle have if it had twice the mass and was moving at the same speed?

a)

twice the momentum; 48 kg*m/s

b)

1/2 the momentum; 12 kg*m/s

c)

4x the momentum; 96 kg*m/s

d)

1/4 the momentum; 6 kg*m/s

33.

The momentum of an object depends upon the object's ___________&_____________.

a)

size and shape

b)

mass and speed

c)

mass and veloctiy

d)

mass and energy

34.

A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?

a)

8 m/s

b)

32 m/s

c)

0.125 m/s

d)

18 m/s

35.

A 3 kg cart has a momentum of 18 kg m/s. What is its velocity?

a)

6 m/s

b)

54 m/s

c)

0.17 m/s

d)

15 m/s

36.

What is the momentum if the mass is of an object is 35 kg and it has a velocity of 10 m/s?

a)

3.5 kg*m/s

b)

35 kg*m/s

c)

0.3 kg*m/s

d)

350 kg*m/s

37.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
38.
Energy of a rock perched on a cliff is an example of...
a)
gravitational
b)
elastic
c)
chemical
d)
kinetic
39.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
40.
The SI unit of work is?
a)
Joules
b)
Watts
c)
Newtons
d)
meters
41.
The SI unit for power is...?
a)
Watts
b)
Joules
c)
Newtons
d)
Meters
42.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
43.
Gravitational potential energy depends on the ________ and ________ of the object. 
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction 
44.
Why does the total amount of mechanical energy stay constant in a system?
a)
energy is not created or destroyed
b)
energy leaves
c)
energy enters
d)
energy is not converted from one form into another
45.
At which point(s) on the roller coaster is the gravitational potential energy at its maximum?
a)
A
b)
B
c)
C
d)
D
46.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
47.
What is the difference between calculating power and work?
a)
Power takes into account the time it takes to complete a task
b)
Work takes into account the time it takes to complete a task
c)
Power is force/area
d)
Work is force/area
48.
Kinetic Energy is defined as
a)
Energy stored due to its location
b)
Energy of motion
c)
Energy stored in the bonds of molecules
d)
Heat energy
49.
The equation to find kinetic energy is
a)
KE=1/2mv2
b)
KE=mgh
c)
KE=1/2kx2
d)
KE=Fd
50.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?
a)
Potential Energy
b)
Kinetic Energy
c)
Nuclear Energy
d)
Chemical Energy
51.

(Gravitational) Potential Energy is calculated by PE = mgh. A 4 kg box sits on a table that is 1.5 m above the floor. How much potential energy does the box have?

a)

(4) (10) (1.5)

b)

4 (1.5)

c)

4 (40) (1.5)

52.

An alternate equation for work - called the Work-Energy Theorem: W = ΔE. Work is defined as…(3 words)

a)

amount of friction

b)

change in energy

c)

action reaction force

d)

mass times acceleration

53.

Two other equations for work (based on kinetic and potential energies): W= Δmgh W = Δ(½)mv^2

Do you see how these must be true?

a)

yes

b)

no

54.

What is meant by an "internal" force?

a)

A force within an object or system that does not result in a change of energy in the object or system.

b)

A force acting on an object or system from outside the object or system causes a change of energy in the object or system.

c)

A push or pull that causes a change im the motion of an object.

d)

A change in the velocity of an object over time.

55.

The sum of the kinetic and potential energy in a system is known as the system's _____________________ energy.

a)

mechanical

b)

chemical

c)

thermal

d)

combined

56.

Using the equation for KE= 12mv2\frac{1}{2}mv^2 , what is the energy of the 5-kg moving object moving at 4 m/ s2s^2  ?

a)

20 Joules

b)

40 Joules

c)

30 Joules

d)

1.2 Joules

57.

Katy wants to design a roller coaster where the passenger is traveling super fast at the bottom. What characteristics should the roller coaster have?

a)

It should be flat and close to the ground. This way the passenger will have an increase in speed because he/she starts out close to the ground.

b)

It should have no friction and the passenger should start off high above the ground. This way the passenger starts out with a lot of potential energy that can be transformed into kinetic energy.

c)

It should have lots of friction and be very tall. This way the passenger will speed up because of the large amount of friction.

d)

It doesn’t matter how you design the rollercoaster the passenger’s speed will be the same at all points on the rollercoaster.

58.

Match the following

a)
1.

Nuclear Energy

b)
2.

Sound energy

c)
3.

Thermal Energy

d)
4.

Chemical

Energy

e)
5.

Mechanical Energy

59.

An effort of 450 newtons is applied to this pulley. What is the force of the load that will be lifted?

a)

450

b)

600

c)

750

d)

900

60.

A simple machine that consists a rigid bar that pivots on a fixed point

a)

lever

b)

pulley

c)

wheel and axle

d)

fulcrum

61.

When force is used to move an object across a distance, this is called...

a)

effort

b)

power

c)

energy

d)

work

62.

The device used to raise a flag up a flag pole is an example of a

a)

wheel and axle

b)

lever

c)

inclined plane

d)

pulley

63.
What is effort (input) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
64.
The ramp helps the man do work by reducing the input ____________.
a)
distance
b)
force
c)
time
d)
power
65.

What are two types of pulleys?

a)

wings, fries

b)

load. weight

c)

fixed, movable

d)

effort, force

66.

What does this image represent?

a)

A pulley

b)

A wedge

c)

A lever

d)

A wheel and axle

67.

Match the following

a)

catapult

1.

a machine capable of launching heaby objects

b)

Archimedian screw

2.

a device invented to raise water

c)

Law of Acceleration

3.

Newton's Second Law of Motion

d)

Law of Inertia

4.

Newton's First Law of Motion

e)

Law of Action & Reaction

5.

Newton's Third Law of Motion

68.
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
a)
H3PO4
b)
H2SO4
c)
HCIO3
d)
H20
69.

How many atoms in all are in a molecule of serotonin?

C10H12N2O

a)
22
b)
24
c)
25
d)
4
70.

Name the ionic compound: MgSO4

a)

magnesium sulfate

b)

magnesium oxide

c)

magnesium sulfide

d)

magnesium sulfur oxide

71.

Name the ionic compound: NH4NO3

a)

ammonium nitrite

b)

ammonia nitride

c)

ammonium nitrate

d)

ammonia nitride

72.

Balance the equation: __Al + __HCl → __H2 + __AlCl3

a)

2, 6, 3, 2

b)

4, 12, 3, 4

c)

balanced

d)

6, 3, 2, 3

73.

Balance the equation: __P4 + __O2 → __P2O3

a)

balanced

b)

1, 2, 3

c)

2, 1, 3

d)

1, 3, 2

74.

Balance the equation: __C2H6 + __O2 → __CO2 + __H2O

a)

2, 7, 4, 6

b)

1, 5, 2, 3

c)

1, 2, 1, 2

d)

1, 3, 1, 2

75.

Balance the equation: __CF4 + __Br2 → __CBr4 + __F2

a)

2, 1, 2, 1

b)

1, 2, 1, 2

c)

1, 2, 2, 1

d)

2, 2, 2, 2

76.

In what state of matter is AlPO4AlPO_4   in, for the reaction below?

2AlPO4(aq)+3Mg(s) → 2Al(s)+Mg3(PO4)2(aq)2AlPO_4\left(aq\right)+3Mg\left(s\right)\ \rightarrow\ 2Al\left(s\right)+Mg_3\left(PO_4\right)_2\left(aq\right)  

a)

solid

b)

liquid

c)

gas

d)

aqueous

77.

What number will balance the following chemical reaction?

S8+8O2→S_8+8O_2\rightarrow  _ SO2SO_2  

a)

1

b)

4

c)

8

d)

16

78.
Which of the following is a unit of speed?
a)
km/hr
b)
hr
c)
km
d)
s
79.
What is velocity?
a)
the quickness of an object
b)
the location of an object
c)
acceleration
d)
speed in a specific direction
80.
Velocity is both ____ and _____. 
a)
speed , direction 
b)
direction, mass
c)
volume, density 
d)
direction, magnitude 
81.

What is the object's displacement during the 10.0 s of motion?

a)

22 m

b)

4 m

c)

-4 m

d)

-9 m

82.

What is speed?

a)

It is how far you go

b)

It is the distance traveled over a period of time

c)

It is how fast you accelerate

d)

It is the change in the postilion of a object

83.
What is the difference between instantaneous speed and average speed?
a)
Average speed happens in a particular instant, Instantaneous speed is the speed of an object over a longer period of time.
b)
Instantaneous speed is never right, average speed is always right
c)
Instantaneous speed happens in a particular instant, Average speed is the speed of an object over a longer period of time.
d)
Do not pick this answer
84.
Displacement is distance combined with
a)
direction
b)
speed
c)
velocity
d)
magnitude
85.
According to the graph how far does the person travel in the first 5 seconds?
a)
2 m
b)
10 m
c)
0 m
d)
5 m
86.
What is the person doing from 5 seconds to 10 seconds?
a)
Walking 
b)
Running
c)
Standing Still 
d)
Walking Fast
87.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
88.
As you move down the periodic table atoms get bigger.  This is because ____________.
a)
The atoms have more mass.
b)
The atoms have more protons.
c)
The atoms have more energy levels
d)
The atoms have more neutrons
89.

What type of bond is formed when atoms SHARE electrons?

a)

covalent

b)

Ionic

90.

Which type of chemical bond is formed by the electrostatic force between a positive ion and a negative ion?

a)

covalent

b)

ionic

91.
What direction does friction act relative to motion?
a)
in the same direction
b)
in the opposite direction 
c)
need more information
d)
depends on the force
92.

Normal force is

a)

Always opposite the weight

b)

Always parallel and down the incline

c)

Always perpendicular to the surface

d)

It depends on the direction of motion

93.
What does friction produce?
a)
light
b)
sound
c)
heat
d)
gravity
94.
What are the units on the force due to friction?
a)
none
b)
Newtons
c)
meters
d)
kilograms
95.
How can friction be reduced?
a)
reduce the force acting between the 2 surfaces
b)
reduce the roughness of the 2 surfaces coming in contact
c)
use wax, grease or oil
d)
all of the above are ways of reducing friction
96.
A type of friction that occurs when air pushes against a moving object causing it to decelerate.
a)
surface area
b)
air resistance
c)
velocity
d)
gravity 
97.

Organize these options into the right categories

Categorize the following

chlorine

Xe

oxygen

hydrogen

silver

copper

magnesium

sodium

Non metal
Metal
98.

____ and ____ combine to yield ____ and____.

a)

zinc chloride , Hydrogen ,zinc , hydrochloric acid

b)

zinc , hydrochloric acid , zinc chloride , Hydrogen

c)

hydrochloric acid , zinc chloride, Hydrogen, zinc

d)

zinc chloride , Hydrogen , hydrochloric acid , zinc

99.

Chemical Reaction is :

a)

Always endergonic

b)

Rearrangement of electrons in a chemical bond

c)

Both answers are correct

d)

None of them

100.

Who invented gravity?

a)

Isaac Newton

b)

Galileo

c)

Stephen Hawking

d)

Nobody. Gravity’s always been here.

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