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Yr 8 Energy Revision
| Question | Answer |
|---|---|
| What type of energy does a tennis ball have when you are holding it in your hand? | Gravitational Potential Energy |
| What type of potential energy is found in food? | Chemical potential energy |
| Can energy be created? | No, it is converted from one form to another |
| When a torch is turned on is the energy transferred or transformed? | Transformed |
| A toasted uses electrical energy to produce what type of energy? | Heat |
| What are examples of renewable energy? | Solar, wind, hydroelectric |
| True or false: Energy can disappear | False |
| What is the law that relates to the transfer of energy? | Law of conservation of energy |
| Can energy be passed on or wasted? | Yes |
| A ball rolls down a slope. What type of energy is this? | Kinetic |
| A candle is lit. What type of energy is produced? | Heat, light |
| A phone is charged. What type of energy is this? | electrical |
| Music is played through speakers. What type of energy is this? | Sound |
| What is the formula for energy efficiency? | Useful energy / total energy * 100 = Energy Efficiency |
| What does a Sankey diagram show? | Useful and wasted energy |
| Energy that serves the purpose of the appliance is... | Useful |
| Energy that is not intended for use by the appliance is... | Wasted |
| Energy is stored in our bodies for later use. What type of energy is this? | Chemical potential energy |
| How does the sun produce energy? | Nuclear reactions |
| If an object does not have GPE where would I find it? | On the ground |
| True or false: the sun is the source of energy for life on earth. | True |
| What is potential energy? | Stored energy |
| Would you call a lamp with an energy effciency of 20% efficient? | No - 80% is wasted energy |
| A torch 80% energy efficient. What type of energy is the wasted energy? | Heat |
| The energy starts in the sun. Travels to the Earth in 2 forms before being adsorbed by plants and converted again via photosynthesis. Name the 4 types of energy mentioned | Heat, light, chemical, nuclear |
| What is the difference between transformed and transferred energy? | The energy type changes in transformations |
| What material transfers heat energy most effectively? | metals |
| Name 3 forms of potential energy. | Gravitational, chemical, elastic, nuclear |
| Why is potential energy important? | It stores energy so it can be released |
| Street lamp: Useful 25J, wasted Energy 75J. What is its energy efficiency? | 25% |
| What is energy efficiency? | How well an device changes energy to useful energy |
| What type of material is poor at allowing heat to move through it? | Insulator |
| What unit of measurement is used to measure energy? | Joules (J) |
| What type of energy does a skydiver have half way through his jump? | Gravitational potential energy and kinetic |
| What type of energy is stored in a battery? | Chemical |
Created by:
Sutt2019
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