Flashcards
Unit 5.2 - Yonis Abdi
Cards in this deck (20)
- 1Unit 5.2 - Energy Efficiency
- 2Wat is energy efficiency?The proportion of useful energy output from a device compared to the amount of energy that is input (expressed as a percentage).
- 3What is useful energy?The amount of energy that is actually used in work.
- 4What is wasteful energy?The energy that is lost.
- 5What is the initial energy in using a toothbrush?Electric energy
- 6What is the useful energy produced?Kinetic energy
- 7What is the wasted energy?Heat and sound energy.
- 8What is initial energy in playing cricket?chemical energy
- 9Useful?Kinetic
- 10Wasted?Heat and sound
- 11Initial energy when using an iPad?Chemical energy
- 12Useful?Sound and light energy
- 13Wasted?Heat energy
- 14Initial energy when using a torch?Chemical
- 15Useful?Light energy
- 16Wasted?Heated energy
- 17What is energy rating label?A label showing a number of stars which can be used to compare the energy efficiency of different appliances.
- 18What type of energy is often listed as wasted energy?Heat energy
- 19What is insulation?Material placed in ceilings and between the walls of a house to reduce heat transfer.
- 20BananaRice
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- Grade 8 Science Flashcards on Unit 5.2 - Yonis Abdi , created by Yonis Abdi on 01/08/2017.
- Created by
- Yonis Abdi · Aug 2017
- Updated
- Aug 3, 2017
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