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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the best colour for a central heating radiator, glossy white or dull black? |
Dull Black |
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Why do solids have a fixed volume? |
The particles are held together in fixed positions. |
Particle formation. |
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When a liquid evaporates why is the average kinetic energy of the remaining molecules reduced? |
Most energetic molecules leave liquid so the the average kinetic energy of remaining molecules is reduced |
Liquid. |
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What happens to the rate of energy transfer between an object and its surroundings if the temperature difference is reduced? |
If the temperature difference is reduced, the rate of energy transfer decreases |
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Which types of energy transfer involve particles? |
Conduction Convection Evaporation |
C C E |
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How does energy from the sun reach the earth? |
As radiation that travels through space |
☀️☀️☀️ |
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How does the colour of a surface affect the rate of conduction? |
It doesn't |
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Why are gases poor conductors? |
Their particles are far apart |
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Why are metals the best conductors? |
The contain free electrons. |
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What is convection? |
The movement of energy through a fluid by movement of a fluid itself. |
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What is conduction? |
The transfer of heat energy through a material, without the material itself moving. |
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What is radiation? |
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionisation |
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How does cavity wall insulation reduce energy transfer from a house? |
It traps air in cavity pockets and prevents convection currents. |
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What form of energy does a moving car have? |
Kinetic |
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What form of energy does a stretched spring have? |
Elastic Potential |
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When is electrical energy transferred? |
When electric current flows. |
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What are the useful energy transfers that take place in a hairdryer? |
Electrical energy to kinetic energy, and electrical to thermal. |
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What are the useful energy transfers that take place in a t.v. |
Electrical energy to light and sound. |
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What energy transfers take place when you lift a ball into the air and the drop it so it falls to the ground? |
Kinetic energy, to gravitational potential energy to kinetic |
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