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WorksheetsMIDTERM REVIEW
Total questions: 72
Worksheet time: 59mins
To calculate the net force of this problem, you need to ?
Add the forces
Subtract the forces
Multiply the forces
Divide the forces
Which example involves the transformation of chemical energy directly into light energy?
a windmill
a glow stick
photosynthesis
a hydroelectric dam
Energy can be changed from one form to another. Changes in the form of energy are called energy conversions. Identify which best describes the energy used to pluck guitar strings to make sound.
electricity
electromagnetic
heat
mechanical
A light bulb converts electrical energy into light and ____.
chemical.
electromagnetic.
heat.
nuclear.
How can we increase the gravitational potential energy of the car?
Keep the length of the hill at 50 m but only 5 m tall.
Keep the hill at 10 m tall but increase the length of the hill so that the car has farther to roll.
Take the interior out of the car so that the car has less mass.
Strap a boulder to the car so that it weighs more.
A student needs help completing an energy transfer diagram for a ceiling fan. Which BEST fills in the blanks labeled M and N to describe the transfer of energy?
N: Electrical and M: Potential energy
N: Light energy and M: Electrical energy
N: Electrical energy and M: Kinetic energy
N: Mechanical energy and M: Electrical energy
Electrical energy can be transformed into other types of energy. We often experience this transformation of energy in our everyday lives. The example that represents a transformation from electrical to sound energy is
flashlight.
campfire.
television.
lamp.
When gasoline is burned in a car engine, ________ energy is converted into _________ energy.
heat, chemical
chemical, potential
mechanical, chemical
chemical, mechanical
A light bulb converts electrical energy into light and ____.
chemical.
electromagnetic.
heat.
nuclear.
How would you describe the relationship between the mass of a car and its kinetic energy?
As the mass of a car increases, its kinetic energy decreases.
As the mass of a car decreases, its kinetic energy increases.
There is no clear relationship between mass and kinetic energy.
As the mass of a car increases, its kinetic energy increases.
The sum of kinetic energy and potential energy within a system is called
thermal energy.
mechanical energy.
chemical energy.
electrical energy.
One of these items transforms electrical energy into sound. It is
firecracker.
a violin.
a radio.
a drum.
Which of following statements is TRUE?
In a radio, sound energy is transformed into electricity energy.
In a microwave oven, electricity is transformed into chemical energy.
In a hair dryer, electrical energy is transformed into light and heat.
In a computer, electrical energy is transformed into sound, light, and heat.
What energy transformations occur in a hydropower dam?
kinetic --> mechanical --> light
mechanical --> sound --> electrical
potential --> mechanical --> electrical
potential --> electrical --> mechanical
Which represents the energy transformation of chemical to light?
an electric toaster
a burning candle
a lamp plugged into a socket
an iPad
A student observes that ice floats in water. The student can conclude
The density of ice is less than the density of water
The density of ice is greater than the density of water
The density of ice is equal to the density of water
Identify which images are PURE SUBSTANCES! (Check all that apply) : )
Which of these is a compound?
Aluminium (Al)
Carbon Dioxide (CO2)
Nitrogen (N)
Sand
Which of these is a compound?
Aluminium (Al)
Carbon Dioxide (CO2)
Nitrogen (N)
Sand
Which of the following is NOT an example of balanced forces?
a roller coaster moving forward at a constant speed of 10 m/s
a roller coaster sitting motionless while passengers get on
a roller coaster going around a loop at a constant speed
Unbalanced forces ALWAYS result in which of the following?
acceleration
constant velocity
constant speed & direction
inertia
Doug and Linda were playing tug of war. Doug pulled the rope with a force of 10N to the west. Linda pulled the rope with a force of 12N to the east. What was their net force and direction of motion?
22N east
2N east
22N west
2N west
Which description of the energy conversions in this process is correct?
The chemical energy in the fuel-air mixture is converted to thermal energy, which is then converted to mechanical energy
The mechanical energy in the fuel-air mixture is converted to electrical energy, which is then converted to thermal energy
The electrical energy in the fuel-air mixture is converted to mechanical energy, which is then converted to thermal energy
The thermal energy in the fuel-air mixture is converted to electrical energy, which is then converted to mechanical energy
Chemical Energy
Thermal Energy
Light Energy
Mechanical Energy
When a small car pushes a big truck, the truck applies an equal and opposite force on the car.
False
True
How is this an example of Newton’s Third law?
Only the ball is using the head
They are both exerting an equal force on each other
Only the head is pushing the ball
The forces in a force pair are in _______ direction
opposite
same
When a heavy football player and a light one run into each other, who exerts more force
The light one
Their force are equal
The heavy one
Force always come in________
waves
triplets
pairs
What happens to the balloon if the air is released ?
Balloon goes right
Balloon goes up
Balloon goes down
Balloon goes left
Which of Newton's Laws of Motion does this Newton's cradle demonstrate?
Newton's 1st Law of Motion (interia)
Newton's 2nd Law of Motion (F=m * a)
Newton's 3rd Law of Motion (action-reaction)
At which position is kinetic energy the greatest?
W
X
Y
Z
At which position is potential energy the greatest?
W
X
Y
Z
At which position does the cart have the MOST potential energy?
A
B
C
D
A mother and daughter press their hands together then push apart while ice skating.
Immediately after they push away from each other, how does the motion of the mother and daughter change?
Both move forward but the mother moves with a greater acceleration.
The mother moves forwards, and the daughter moves backward with a greater acceleration.
Both move backward, but the daughter moves with a greater acceleration.
The mother moves backwards, and the daughter moves forwards with a greater acceleration.
A sheet of notebook paper lying
motionless on a table and not
touched by an outside force will
MOST likely remain motionless
because —
balanced forces exerted by
gravity and the air keep the
paper motionless
an unbalanced force is exerted
by the table to keep the paper
motionless
an unbalanced force is exerted
by the air to keep the paper
motionless
balanced forces exerted by
gravity and the table keep the
paper motionless
What is the direction of the resulting net force?
up
down
left
right
In the picture above, a boy is trying to pull a dog on a leash, but the dog and the boy are moving in the same direction. Which of the following best describes the forces in this situation?
The forces are balanced, and the dog is weaker than the boy
the forces are unbalanced, and they boy's force is greater
the forces are balanced, and the net force is zero
the forces are unbalanced, and the dog's force is greater
Which image represents a longitudinal wave?
A
B
What is a wave ?
a disturbance that transfers matter
a disturbance that transfers energy
a disturbance that transfers both matter and energy
What amount of sunlight makes pea plants grow tallest? What is the independent variable?
height of pea plants
amount of sunlight
type of soil
Scientists ask this at the beginning of an experiment
Question
Data
Observation
Hypothesis
Which type of observation? "The cat has orange fur on his ears."
Qualitative
Quantitative
Is the height of a ball's bounce affected by the height from which the ball is dropped? What is the dependent variable?
height from which the ball is dropped
type of ball
height of the ball's bounce
Is the height of a ball's bounce affected by the height from which the ball is dropped? What is the dependent variable?
height from which the ball is dropped
type of ball
height of the ball's bounce
•Friction is an example of a contact force between two surfaces that are touching.
true
false
Check ALL examples that show gravity at work.
A ball falling back to the ground is an example of which force?
magnetism
gravity
electricity
attraction
When arrows are pointing in opposite directions, how are forces combined?
You add them
You subtract them
You multiply them
You divide them
What does letter A represent
applied force
net force
gravity
friction
________is what makes up all things in the universe.
Weight
Mass
While you are playing with magnets ,we observe that like poles repel. It is due to
Contact forces
Non contact forces
Unbalanced
Balanced
Which of the following objects cannot be moved by a magnet?
A paper clip
A nail
A toothpick
A staple
