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Worksheets2nd Semester Final Exam Part 1
Total questions: 63
Worksheet time: 32mins
Name
Class
Date
1.
An ideal machine would have an efficiency of
a)
1%
b)
10%
c)
50%
d)
100%
2.
Pascal’s principle states that when force is applied to a confined fluid, the change in pressure is transmitted
a)
only to the area where the pressure is applied.
b)
equally to all parts of the fluid
c)
to any weakness in the fluid’s container.
d)
. in the direction of the buoyant force.
3.
The measure of the upward force applied by a fluid on an object is called:
a)
density
b)
buoyancy
c)
weight
d)
volume
4.
An object will sink if...
a)
its density is equal to that of the substance it’s in
b)
its density is less than that of the substance it’s in
c)
its density is greater than that of the substance it’s in
d)
its density is twice as much as the substance it is in
5.
The force that pulls falling objects toward Earth is called
a)
gravity
b)
free fall
c)
acceleration
d)
air resistance
6.
A simple machine that might be thought of as an inclined plane that moves is a
a)
lever
b)
wheel and axle
c)
wedge
d)
pulley
7.
Which of the following is an example of rolling friction?
a)
your shoes on a sidewalk as you walk
b)
bike tires on the road as you ride
c)
a boat on the water as it sails
d)
two hands rubbing together
8.
Which of the following are examples of observations about a soccer ball?
a)
they like to play soccer
b)
the ball is round
c)
They are on a soccer team
d)
they are good at soccer
9.
What effect does a buoyant force have on a submerged object?
a)
It causes the object to sink in a fluid.
b)
It causes a net force acting upward on the object
c)
It causes the object to float in a fluid.
d)
It causes a net force acting downward on the object.
10.
The average random kinetic energy of atoms or molecules within an object is a measure of the object’s:
a)
heat
b)
temperature
c)
thermal energy
d)
specific heat
11.
Four groups of college students were randomly selected and assigned. Group 1 was allowed to study Biology for 1 hour; Group 2 studied Biology for ½ hour; and Group 3 studied Biology for ¼ hour. Group 4 was not permitted to study. The next morning, each student was given the same test.
Which if the following is a constant for this experiment?
Which if the following is a constant for this experiment?
a)
time allowed to study
b)
when they took the test
c)
their scores on the test
d)
how well they did on the test
12.
Four groups of college students were randomly selected and assigned. Group 1 was allowed to study Biology for 1 hour; Group 2 studied Biology for ½ hour; and Group 3 studied Biology for ¼ hour. Group 4 was not permitted to study. The next morning, each student was given the same test.
The dependent variable is
The dependent variable is
a)
time allowed to study
b)
when they took the test
c)
their scores on the test
d)
that they were given the same test
13.
Four groups of college students were randomly selected and assigned. Group 1 was allowed to study Biology for 1 hour; Group 2 studied Biology for ½ hour; and Group 3 studied Biology for ¼ hour. Group 4 was not permitted to study. The next morning, each student was given the same test.
The independent variable is
The independent variable is
a)
time allowed to study
b)
when they took the test
c)
their scores on the test
d)
that they were given the same test
14.
Four groups of college students were randomly selected and assigned. Group 1 was allowed to study Biology for 1 hour; Group 2 studied Biology for ½ hour; and Group 3 studied Biology for ¼ hour. Group 4 was not permitted to study. The next morning, each student was given the same test.
The control group is
The control group is
a)
group 1
b)
group 2
c)
group 3
d)
group 4
15.
Niagara Falls is a good example of
a)
kinetic energy being converted into potential energy
b)
potential energy being converted into kinetic energy
c)
energy being lost
d)
energy being created
16.
The flow of thermal energy is called:
a)
temperature
b)
specific heat
c)
heat
d)
thermal equilibrium
17.
- Objects falling through air experience a type of friction called
a)
terminal velocity
b)
air resistance
c)
inertia
d)
rolling friction
18.
A ramp is an example of a simple machine called a(n)
a)
inclined plane
b)
wedge
c)
lever
d)
pulley
19.
The mechanical advantage of a machine is the number of times a machine increases
a)
the distance an object is moved.
b)
the amount of friction.
c)
the change in direction.
d)
the force exerted on the machine.
20.
When you rub your hands together on a cold day, you use friction to convert
a)
mechanical energy into thermal energy.
b)
thermal energy into nuclear energy.
c)
nuclear energy into electrical energy
d)
electrical energy into electromagnetic energy
21.
A dictionary whose mass is 1 . 0 kilograms lying on a stationary table exerts a force of 9.8 newtons on the table. The force exerted on the dictionary by the table is ____ newtons. A. 1.0
a)
1.0
b)
8.8
c)
9.8
d)
10.8
22.
One example of a physical change is
a)
burning paper
b)
baking cookies
c)
heating table sugar
d)
dissolving salt in water
23.
Energy that is stored due to the position of an object may be called ____ energy.
a)
kinetic
b)
potential
c)
radiant
d)
nuclear
24.
In order to do work on an object, the force you exert must be
a)
the maximum amount of force you are able to exert
b)
in the same direction as the object’s motion.
c)
in a direction opposite to Earth’s gravitational force.
d)
quick and deliberate.
25.
The wedge, screw, and lever are all
a)
simple machines
b)
compound machines
c)
found in the human body
d)
100 percent efficient
26.
The energy associated with motion is called
a)
kinetic energy
b)
elastic potential energy
c)
gravitational potential energy
d)
nuclear energy
27.
Which of the following correctly list the steps of the scientific method in order?
a)
Hypothesis, procedure, observations, conclusion
b)
Problem, hypothesis, procedure, observations, conclusion
c)
Procedure, hypothesis, problem, observations, conclusion
d)
Problem, hypothesis, observations, procedure, conclusion
28.
In science, work is defined as:
a)
the mass of an object multiplied by its acceleration.
b)
the mass of an object multiplied by the force required to move it.
c)
force multiplied by the distance moved in a direction perpendicular to the force
d)
force multiplied by the distance moved in the same direction as the force.
29.
When a spring is compressed:
a)
the potential energy stored in the spring increases.
b)
the potential energy stored in the spring decreases
c)
. the spring constant of the spring is decreased
d)
the spring constant of the spring is increased.
30.
When you raise or lower a flag on a flagpole, you are using a(n)
a)
wheel and axle
b)
pulley
c)
wedge
d)
inclined plane
31.
“Forces occur in pairs” is another way of stating Newton’s:
a)
first law of motion
b)
second law of motion
c)
third law of motion
d)
universal law of motion
32.
- Smoke rises up a chimney partly because of
a)
Archimedes' princple
b)
Pascal's principle
c)
Bernoulli's principle
d)
Newton's third law of motion
33.
What scientific rule states that the buoyant force on an object is equal to the weight of the fluid displaced by the object?
a)
Archimedes' princple
b)
Pascal's principle
c)
Bernoulli's principle
d)
Newton's third law of motion
34.
The power of a light bulb that converts electrical energy at a rate of 100 joules every 2 seconds is
a)
50 watts
b)
200 watts
c)
100 watts
d)
40 watts
35.
The law of conservation of energy states that when one form of energy is converted into another,
a)
energy is destroyed in the process.
b)
no energy is destroyed in the process.
c)
energy is created in the process.
d)
some amount of energy cannot be accounted for.
36.
Water pressure increases as
a)
depth increases
b)
gravity decreases
c)
force decreases
d)
acceleration increases
37.
An example of an insulator is
a)
rubber
b)
copper
c)
silver
d)
iron
38.
The momentum of a 2000 kilogram car traveling at 20 meters per second is:
a)
0 kg·m/sec.
b)
0.001 kg·m/sec.
c)
100 kg·m/sec.
d)
40,000 kg·m/sec.
39.
The achievement of lifting a rocket off the ground and into space can be explained by
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
d)
the law of conservation of momentum
40.
Cooking popcorn with an air popper is an example of which kind of heat transfer?
a)
radiation
b)
convection
c)
movement
d)
conduction
41.
Cooking popcorn on the stove is an example of which kind of heat transfer?
a)
radiation
b)
convection
c)
movement
d)
conduction
42.
Cooking popcorn in a microwave is an example of which kind of heat transfer?
a)
radiation
b)
convection
c)
movement
d)
conduction
43.
The amount of matter in an object is called its
a)
inertia
b)
mass
c)
force
d)
balance
44.
The force of gravity on a person or object on the surface of a planet is called
a)
mass
b)
terminal velocity
c)
weight
d)
free fall
45.
The mechanical advantage of a machine that changes only the direction of force is
a)
1
b)
less than 1
c)
greater than 1
d)
0
46.
If you exert a force of 20 newtons to push a desk 10 meters, how much work do you do on the desk?
a)
200 joules
b)
30 joules
c)
10 joules
d)
100 joules
47.
In physical science, a push or a pull is called a(n)
a)
force
b)
acceleration
c)
inertia
d)
motion
48.
If tight scissors have an efficiency of 50 percent, half of your work is wasted due to
a)
the output force
b)
the input force
c)
friction
d)
changes in direction
49.
Air pressure decreases as
a)
velocity increases
b)
elevation increases
c)
acceleration decreases
d)
gravity increases
50.
Which of the following lists the steps of the scientific method in order?
a)
problem, hypothesis observations, conclusion, procedure
b)
. problem, hypothesis, procedure, observations, conclusion
c)
hypothesis, procedure, observations
d)
hypothesis, problem, procedure, observations, conclusion
51.
A classroom measures 4.33 meters wide. How wide is the classroom in centimeters?
a)
0.433 cm
b)
43.3 cm
c)
433 cm
d)
4,330 cm
52.
The force that one surface exerts on another when the two rub against each other is called
a)
friction
b)
acceleration
c)
inertia
d)
gravity
53.
The equation that correctly expresses Newton’s second law is:
a)
force = mass / acceleration
b)
force = mass x acceleration
c)
force = mass + acceleration
d)
force = mass - acceleration
54.
Density is calculated as:
a)
mass times volume
b)
mass divided by volume
c)
volume divided by mass
d)
mass plus volume
55.
The density of a block of wood with a volume of 50 cubic centimeters and a mass of 100 grams is
a)
2 g/cm3
b)
0.5 g/cm3
c)
500 g/cm3
d)
5,000 g/cm3
56.
What type of conversion is taking place when natural gas is used to heat water?
a)
chemical energy into thermal energy
b)
thermal energy into mechanical energy
c)
mechanical energy into electromagnetic energy
d)
electromagnetic energy into chemical energy
57.
Newton's first law is also known as the law of:
a)
inetia
b)
universal gravitation
c)
force pairs
d)
unbalanced forces
58.
Calculate the work done to lift a barbell weighing 100 newtons a distance of 1.5 meters
a)
0.015 joules
b)
15 joules
c)
66.7 joules
d)
150 joules
59.
Heat energy from the sun is transferred to Earth by:
a)
radiation
b)
conduction
c)
convection
d)
insulation
60.
Which of the following has kinetic energy?
a)
a rock poised for a fall
b)
an archer's bow that is drawn back
c)
a rolling bowling ball
d)
a car waiting at a red light
61.
Which of the following are quantitivative observations
a)
there are five red apples
b)
the apples are red
c)
the apples are shiney
d)
apples feel smooth
62.
For work to be done on an object,
a)
some force need only be exerted on the object.
b)
the object must move some distance as a result of a force.
c)
the object must move, whether or not a force is exerted on it.
d)
the object must not move.
63.
One example of a chemical change is
a)
filtering
b)
burning wood
c)
boiling water
d)
crushing a can
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