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- 1. Multiple ChoiceThe law of conservation of energy states that when one form of energy is converted into another,energy is destroyed in the processno energy is destroyed in the processenergy is created in the processsome amount of energy cannot be accounted for
- 2. Multiple ChoiceIn energy transformations, "wasted energy" usually takes what form?heatchemical energylightsound waves
- 3. Multiple Choice
Efficiency is calculated by useful energy output divided by total energy input, expressed as a percentage
False
True
- 4. Multiple Choice
When is energy lost?
During transformations only
During transformations and transfers
During transfers only
During GPS outages
- 5. Multiple Choice
Energy efficiency of incandescent lightbulbs is
50%
25%
15%
5%
- 6. Multiple Choice
With wind-electric turbines, electric energy is turned into rotational energy.
True
False
- 7. Multiple Choice
Energy efficiency of wind turbines is about
90%
75%
40%
12%
- 8. Multiple Choice
Which type of alternative energy source is shown in this picture?WindSolarHydroelectricGeothermal - 9. Multiple Choice
What is the energy efficiency of hydroelectric dams?
90%
70%
50%
29%
- 10. Multiple ChoiceThe house illustrated here uses panels on the roof to collect a natural resource and convert it into electricity that can be used.
Which alternative energy source does this house use?WaterWindSolarGeothermal - 11. Multiple Choice
How much light energy in converted to electrical energy in commercial solar panels?
75%
60%
20%
5%
- 12. Multiple ChoiceWhich of the following is a fossil fuel?WindCoalSolarBiomass
- 13. Multiple Choice
What is the energy transformation in hydroelectric dams?
Kinetic to electrical
Kinetic to heat
Electric to kinetic
Sound to electric
- 14. Multiple Choice
Around how much energy is lost in power lines and transformers?
25%
10%
2%
0.1%
- 15. Multiple Choice
Just because we CAN do something ...
We totally should!
Doesn't mean it's a good idea ...
We should never try!
Where are those solar panels? I have a great idea where to put them!
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