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- 1. Multiple Choice
The Law of Conservation of Energy states:
Energy can created or destroyed but not transformed
Energy cannot be created or destroyed, it can only transformed
Energy can't be created, destroyed or transformed
Energy cannot be created or destroyed.
- 2. Multiple Choice
What kind of energy does an object possess when it's resting on top of the hill?
Potential Energy
Chemical Energy
Kinetic Energy
All of the above
- 3. Multiple Choice
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%
- 4. Multiple Choice
A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?
5%
50%
55%
100%
- 5. Multiple ChoiceWhat type of device might this Sankey be about?A very efficient LED light bulbA very inefficient incandescent light bulbA coal power plantA wind turbine
- 6. Multiple ChoiceNo machine in existence has 100% efficiency due to ____________________.magicfrictionsmokeinput
- 7. Multiple Choice
Total energy = 200J
Useful energy = 20J
Workout the efficiency of this lightbulb.
100%
80%
40%
10%
- 8. Multiple Choice
To save energy, what should you do when you leave a room ?
USE ELECTRICAL ENERGY
SHUT OFF THE LIGHTS AND TELEVISION
TURN ON THE LIGHTS AND TELEVISION
HANG YOUR CLOTHES OUTSIDE
- 9. Multiple Choice
How can you dry your clothes to save energy?
Use the dryer machine
Don't dry your clothes
Leave the fridge door open
Hang the clothes to dry outside on a line
- 10. Multiple ChoiceTo increase the EFFICIENCY of energy use, we could...Turn off lights when not in useKeep the car running as you go into the storeWater the plants in a drought
- 11. Multiple ChoiceAnother way to save energy is to...Conserve itWaste itUse it
- 12. Multiple ChoiceWhat is energy conservation?Adding up all your energy useReducing energy use
- Answer choicesTagsAnswer choicesTags