WorksheetsDevices and Energy: Summative Assessment
Total questions: 10
Worksheet time: 5hrs 31mins
Your friend says the local hydroelectric plant creates electricity for your town. You know that this is not quite true because energy is converted from one form to another. Read the description about the hydroelectric plant. Select the sentences that will prove to your friend that energy is not being created, but converted into electrical energy.
Hydroelectric plants often have reservoirs of water built up behind a dam.
This is why you often see a lake by a hydroelectric plant.
The turbine is connected to a generator, and the energy is converted into electricity for use.
Water flows from the reservoir through a tunnel.
The moving water spins the blades of a giant turbine.
Omar says that a flower uses energy as it grows. Jacob says the flower does not use energy to grow. Which statement explains which of the two friends is correct?
Omar is correct because the flower transfers energy to the ground.
Omar is correct because any change in the flower requires energy.
Jacob is correct because changes such as growing do not require energy.
Jacob is correct because more energy is lost by the flower than is gained.
How do our bodies get energy from the sun?
We eat plants that contain energy stored from the sun during photosynthesis.
We absorb light energy from the sun and convert it into energy we can use during photosynthesis.
Heat energy from the sun warms our bodies to release stored energy from within our cells.
Heat energy from the sun is used to cook the foods that we eat.
Which statement correctly describes the energy of items in a home?
A. A computer uses electrical energy and nuclear energy.
B. An electric fan uses mechanical energy and sound energy.
C. An electric toaster uses radiant energy and chemical energy.
D. A clothes dryer uses nuclear energy and mechanical energy.
Energy is the ability to do work. Which of the following is considered energy?
air
car
water
electricity
In winter, some people turn on a gas fireplace to stay warm. Others use a generator or burn wood. Which, if any of these, are examples of using energy?
All are examples of using energy because work is done in each case.
None are examples of using energy because work is not done in any case.
Only using the generator is an example of using energy because the generator does work to make electricity.
Only using a gas fireplace and burning wood are examples of using energy because gas and wood are fuels.
Which definition of electricity is NOT correct?
A. Electricity is a form of energy that can do work.
B. Electricity is a form of energy that can make something move.
C. Electricity is a form of energy that flows from positive to negative.
D. Electricity is a form of energy made up of protons, neutrons, and electrons.
Which kind of energy is not produced by the sun?
heat energy
light energy
nuclear energy
mechanical energy
Rube Goldberg is well known for creating a series of cartoons showing complicated contraptions or machines. These contraptions usually do something simple that uses many different steps.
Here is a contraption that shows a ball on a table that rolls down a ramp. The ball strikes a match and the match ignites. The light from the match shines on a photo cell that creates electricity. The photo cell is connected to a meter that measures the voltage of the electricity.
Drag a form of energy to the correct spot in this Rube Goldberg contraption.
You decide to make a batch of chocolate chip cookies. As you read the steps below, think about the different forms of energy. Choose the words that correctly fill in the blanks.
1. First, you preheat the electric oven. As you do this, electrical energy is being converted into (a) energy.
2. Next, you get out the ingredients and begin to mix them together. When you plug in and turn on the mixer, (b) energy is being changed into (c) energy. Your little brother hears you and runs into the kitchen. This tells you that (d) energy is present as well!
3. You put the cookies on the pan and place them in the oven.
4. When they are done, you let them cool. The cookies contain stored (e) energy, and you can't wait to eat one!
