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13 Cards in this Set
- Front
- Back
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What does Kinetic Theory describe?
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How particles move in solids, liquids and gases
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What is the energy in a particle called that is called by movement?
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Kinetic energy
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What happens when you heat a substance? What does this cause?
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You give it's particles more Kinetic energy, this causes the particles to vibrate or move faster, this breaks bonds
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Conduction is ______ in _______ solids
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Either:
faster, more dense slower, less dense |
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Why is conduction faster in denser solids?
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The particles are closer together and so collide more often
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Why do metals conduct well?
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Because the electrons in metals are free to move
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How does conduction occur in metals?
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Electrons at the hot end move faster and then pass on their energy to the electrons next to them, ect.
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How does conduction occur in non-metals?
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Atoms at the hot end move faster and then jostle adjacent atoms and pass on their energy to the atoms next to them
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What is a more effective method of transferring heat, conduction or convection?
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Convection
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What is convection?
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When more energetic particles move from the hotter region to the cooler region and take heat energy with them
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What shaped containers is convection most effective in?
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Roundish or squarish
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What shaped containers is convection least effective in?
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Shallow and wide or tall and thin
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What are convection currents all about?
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Changes in density due to heat energy
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