18669037
Description
Flashcards by Roqaiah Ali, updated more than 1 year ago
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Created by Roqaiah Ali
over 5 years ago
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| Question | Answer |
| Unit 5.1 - Energy around us. | By: Roqaiah Ali |
| What does energy do? | It makes things happen. |
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What are 5 forms of energy?
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Energy (binary/octet-stream)
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- Kinetic energy - Heat energy - Light energy - Sound energy - Electrical energy |
| What is kinetic energy? | Energy possessed by a moving object. |
| What is potential energy? | Stored energy possessed by an object such as elastic potential energy of a squashed spring. |
| What best describes energy stored within a substance? | Chemical energy. |
| What is photosynthesis? | The process in which green plants convert light energy into chemical energy. |
| What are 4 different types of potential energy? | - Gravitational potential energy - Chemical energy - Elastic potential energy - Nuclear energy |
| What is nuclear energy? | Energy stored inside an atom. |
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Define gravitational potential energy?
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Gpe (binary/octet-stream)
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The stored energy of an object that is held above the earth's surface. |
| What is the term called when energy is passed from one object to another? | Energy transfer. |
| What are 3 ways heat energy can be transferred in? |
- Conduction
- Convection
- Radiation
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3+Ways (binary/octet-stream)
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| What is conduction? | Heat transfer between 2 objects in contact. |
| What is radiation? | Heat transfer as a wave, which can even travel through the vacuum of space. |
| Define convection. | The transfer of heat in a liquid or gas. |
| What is it called when energy is changed or transformed? | Energy transformation. |
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Define energy flow diagram.
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Efd (binary/octet-stream)
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A diagram using arrows that shows the way energy is passed on or changed into other forms. |
| What does the law of conservation of energy state? | Its states that energy can never be created nor destroyed. Instead, the energy is conserved, or kept, as it is converted from one form to another. |
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What does the law of conservation mean?
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Lce (binary/octet-stream)
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It means: - Energy might be passed on or wasted but it is never lost - If one object wastes energy, than it is always gained by another object, usually heat. |
| What are the similarities between heat transfer by conduction and heat transfer by convection? | - Conduction and convection are methods of heat transfer - Particles are needed for conduction and convection to occur. |
| What are the differences between heat transfer by conduction and heat transfer by convection? | Convection is a type of heat transfer that occurs in liquids and gases whereas conduction occurs only in solids. |
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Image:
Bye (binary/octet-stream)
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