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WorksheetsEnergy Unit
Total questions: 40
Worksheet time: 20mins
Name
Class
Date
1.
The burners on an electric stove provide a flow of _________ and is then converted into _______________ energy. *
a)
electrical energy; heat
b)
a pathway; conductive
c)
electrical energy; mechanical
d)
a pathway; electromagnetic
2.
A nuclear power plant, a hydroelectric dam, and a coal burning power plant have what in common?
a)
They are all sources of fuel.
b)
They are all sources of electricity.
c)
They are all sources of natural resources.
d)
They all turn solar energy into chemical energy.
3.
The main source of energy for our planet is/are
a)
the sun.
b)
the earth’s core.
c)
greenhouse gases.
d)
cosmic background radiation.
4.
Magnets and electromagnets can both be used to pick up metal items like iron nails. Even though they are similar, there are differences between magnets and electromagnets. An example of one of these differences is that
a)
magnets require an electric current to work.
b)
electromagnets require an electric current to work.
c)
magnets will stick to your refrigerator while electromagnets will not.
d)
electromagnets will stick to your refrigerator while magnets will not.
5.
View Illustration A: Levers above. If each lever is used to lift the same box up onto a table one meter above the floor. Which of the following answers is correct.
a)
Lever A will require more work.
b)
Lever B will require more work.
c)
Lever A will require more force.
d)
Lever B will require more force.
6.
Conduction occurs more easily between solids and liquids. This is because the particles in gases are
a)
further apart and move faster.
b)
closer together and move faster.
c)
further apart and move more slowly.
d)
closer together and move more slowly.
7.
Megan’s kitty Moe laid by the fire without burning its fur. He stays by the fire to keep warm. What type of heat transfer did Moe the kitty experience?
a)
radiation
b)
conduction
c)
insulation
d)
all of the above
8.
A ________________ is a machine which contains a lever, screw and a wedge that combines to reduce the effort needed to do work.
a)
door stop
b)
light bulb
c)
pair of scissors
d)
handicap ramp
9.
Within the alarm clock seen above (plugged into an outlet), energy is transformed. It’s time to get up! The alarm clock goes off. What are the energy transformations that take place within the alarm clock?
a)
electrical --> heat --> sound
b)
electrical --> light --> sound
c)
electrical --> chemical --> light
d)
chemical --> electrical --> mechanical
10.
A wheel barrow is made of a three simple machines, what are they?
a)
lever, screws, a pulley, and a wheel and axle
b)
lever, screws, an inclined plane, and a wedge
c)
lever, screws, an inclined plane, and a pulley
d)
lever, screws, an inclined plane, and a wheel and axle
11.
Mrs. Everhart and her son Jonathan build an electromagnet (above) by wrapping a wire around a nail and connecting the wire to both terminals of a battery. When they test the electromagnet, it can pick up six paperclips. Mrs. Everhart wants Jonathan to be able to pick up at least ten paperclips. What can he do to increase the number of paperclips that the electromagnet picks up?
a)
Make the wire longer.
b)
Remove the nail from the center of the wire.
c)
Increase the number of loops of wire around the nail.
d)
Spread the loops of wire apart on the nail so that they do not touch.
12.
We can get a sun tan through the process of
a)
conduction
b)
convection
c)
radiation
d)
stratification
13.
Which statement best summarizes the law of conservation of energy?
a)
When work is done, energy is lost.
b)
Heat flows from a warm body to a cold body.
c)
If energy disappears in one form, it must reappear in another.
d)
The fewer number of grams the more energy it would have.
14.
When talking into a cell phone, electrical energy is first transformed into _________________ that is transmitted through the air.
a)
mechanical energy
b)
sound energy
c)
chemical energy
d)
solar energy
15.
What would be the outcome if the light bulb in the image above was replaced with a motor?
a)
The motor would not work in this system.
b)
The light energy would still be produced by the motor.
c)
The motor would be able to turn the switch on and off.
d)
The electrical energy would be transferred into a different type of energy.
16.
In which situation is there NO work being done?
a)
A car being pushed 100 meters.
b)
A 25 Newton force applied over 6 meters.
c)
A mouse pushing a crumb across the floor.
d)
A 10 Newton force applied to a brick wall.
17.
Megan and Scott were experimenting with electromagnets in science class, picking up chains of paperclips. What is one way they can pick up more paperclips?
a)
Increase the battery size.
b)
Decrease the paperclip size.
c)
Decrease the size of the iron nail of the electromagnet.
d)
Increase the paperclip size.
18.
Which tool is primarily made up of two inclined planes?
a)
axe
b)
hammer
c)
pulley
d)
wheel barrow
19.
A generator (above) converts mechanical energy into ____________ energy.
a)
chemical
b)
electrical
c)
light
d)
sound
20.
Students hypothesized that by running an electric current through the wire of the device shown above, they could cause a non-magnetic nail to exhibit magnetic properties. What would be a reasonable way to test this?
a)
Weigh the nail first before turning the current on and again after it is turned off.
b)
Put the nail in water before turning the current on and again after turning it off.
c)
Examine the nail under a microscope before turning the current on and again after turning it off.
d)
See if paperclips will stick to the nail before turning the current on and again after turning it off.
21.
In a gas powered car, a battery
a)
produces chemical potential energy to run the engine.
b)
produces mechanical work to rotate the tires and make the car move.
c)
produces electrical energy to run the lights, stereo and other components.
d)
produces thermal energy to produce heat for the heating and cooling system.
22.
The process of radiation is the ONLY method of heat transfer that can occur
a)
underwater.
b)
through space.
c)
through wood.
d)
through a solid.
23.
Energy is transferred in solids by conduction, which means that
a)
heat travels in both directions.
b)
heat travels from the cooler object to the hotter object.
c)
heat travels from the hotter object to the cooler object.
d)
heat does not travel between objects of different temperatures.
24.
Which machine would NOT be an example of a lever?
a)
broom
b)
seesaw
c)
block & tackle
d)
hammer
25.
We can classify a shovel (above) as a compound machine. This is because a shovel contains both
a)
a lever, screw and a wedge.
b)
a blade, screw and a handle.
c)
a lever, screw and a pulley.
d)
an inclined plane, screw and a wedge.
26.
A pair of scissors (above) is a compound machine. The blades are a modified form of which type of simple machine?
a)
pulleys
b)
screws
c)
inclined planes
d)
wheel & axles
27.
Burning logs in the fireplace produce heat energy. The dog gets warm from the fire when heat energy is transferred in two ways, which type of heat transfer is NOT represented?
a)
convection
b)
radiation
c)
conduction
d)
insulation
28.
How does a single fixed pulley, like the one seen here, help you do work?
a)
Changes the direction of the force.
b)
Increases the amount of effort force.
c)
Decreases the amount of work.
d)
Allows you to pull the rope a shorter distance.
29.
A boulder (above) that is resting on the top of a large mountain falls over the edge towards the ground. As the rock falls, potential energy changes to _____________energy.
a)
chemcial
b)
kinetic
c)
heat
d)
light
30.
What evidence is there that work is being done in the image above?
a)
A lever is being used.
b)
A simple machine makes a task easier.
c)
The rock has a larger force than the boy.
d)
The boy uses force to move the rock a distance.
31.
What is the most approximate mass of the beaker with the blue chemical?
a)
200.9 g
b)
210.9 g
c)
200 g
d)
211 g
32.
This man is using a block and tackle to lift a heavy bale of cotton. The block and tackle contains a fixed and moveable pulley? How does the moveable pulley help the man?
a)
increases the effort force
b)
increases the work done
c)
decreases the effort force
d)
decreases the work done
33.
If you tested a product and determined that it did not work, which step of technological design would you return to?
a)
identify the problem
b)
solution design
c)
implementation
d)
evaluation
34.
Which of the following is a variation of the screw in the image above?
a)
lever
b)
inclined plane
c)
pulley
d)
wheel & axle
35.
What is the energy transformation occurs in the batteries of the flashlight above when it is on?
a)
heat-->magnetic-->light
b)
chemical-->magnetic-->light
c)
chemical-->electrical-->light
d)
mechanical-->electrical-->light
36.
In our science lab, this piece of equipment above is used to measure the effect of gravity on an object in pounds or its ________________ in units called ________________.
a)
mass; grams
b)
height; meters
c)
volume; liters
d)
force; Newtons
37.
There are four (4) steps to technological design. What step would you pass out your product for people to use and try?
a)
problem identification
b)
solution design
c)
implementation
d)
evaluation
38.
There are four (4) steps to technological design, after you pass our your product for people to try, they then decide if it was effective or not?
a)
problem identification
b)
solution design
c)
implementation
d)
evaluation
39.
There are four (4) steps to technological design. What step would you decide what the purpose or problem is you are designing a product for?
a)
problem identification
b)
solution design
c)
implementation
d)
evaluation
40.
What simple machine is the bucket of this wheelbarrow in the image above?
a)
lever
b)
pulley
c)
wheel & axle
d)
inclined plane
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