WorksheetsEnergy test
Total questions: 22
Worksheet time: 17mins
______________________ occurs when energy changes from one form to another.
Energy transformation
Energy transfer
Energy balance
Energy equilibrium
The diagram shows a cart moving freely along a U-shape track. What happens to the energy of the cart as it moves from point A (the top of the u-shape track)to point B (the bottom)?
Potential energy is transformed to kinetic energy.
Kinetic energy is transformed to potential energy.
Both potential energy and kinetic energy stay the same.
A scientist performed an experiment during which she measured the energy transferred in each step of her experiment. The total quantity of energy transferred in all of the steps was less than the amount she measured at the beginning. What is the most likely explanation for this result?
Energy was destroyed during certain steps in the experiment.
The steps in the experiment required more energy than was available.
The experiments created energy that was then used up at a faster rate.
Some energy was transformed into unwanted heat or sound that was not detected.
A hockey player uses her stick to hit a hockey puck. Which statement describes the overall energy transfer?
Energy is transferred from the stick to the puck.
Energy is transferred from the player to the puck.
Energy is transferred from the puck to the player.
Energy is transferred from the stick to the player.
The energy efficiency shown in this Sankey diagram is:
About 10%.
About 30%.
About 60%.
Impossible to tell.
What is the difference between energy transfer and transformation?
They are the same
Transfer is energy moving to a different location. Transformation is energy changing forms.
Transfer is energy changing forms. Transformation is energy moving to a different location.
During an experiment, what is the variable that you are CHANGING?
Control Variable
Independent Variable
Dependent Variable
During an experiment, what is the variable that you are MEASURING?
Dependent Variable
Independent Variable
Control Variable
During an experiment, what is a variable that you are KEEPING THE SAME?
Dependent Variable
Independent Variable
Control Variable
When someone kicks a football, you can hear it. This is because some energy is transformed into Sound energy instead of Kinetic energy. This sound energy is a type of...
Useful energy
Potential energy
Wasted energy
When gasoline is burned in a car engine, ________ energy is converted into _________ energy.
heat, chemical
chemical, potential
mechanical, chemical
chemical, mechanical
Which of these has elastic potential energy?
a vase sitting on a shelf
a stretched rubber band
a child moving down a slide
sugars stored in the molecules of food
Efficiency is calculated by useful energy output divided by total energy input, expressed as a percentage
False
True
A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?
100%
7%
93%
95%
A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?
5%
50%
55%
100%
Which is the best example of kinetic energy?
A car sitting on top of a hill
A skateboard on the sidewalk
A wagon rolling down a hill
A powerwheel parked in the yard
