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23 Cards in this Set
- Front
- Back
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What is temperature?
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the measure of the average KE of the particles in a substance
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What is thermal energy?
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The total energy of the particles in a substance
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What does thermal energy include?
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Temperature and amount of the substance
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What is a thermometer?
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It measures temperature based on the expansion of liquids
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What are the colored thermometers?
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alcohol
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What are the silver thermometers?
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mercury
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What happens to hot substances in a thermometer?
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They expand so molecules spread out to move up the tube.
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What happens to cold substances in a thermometer?
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They condense and move close together so they move down the tube
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What do thermostats use?
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The expansion of metals
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What is absolute zero?
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The KE of a particle is zero. There is no movement. 0 K
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What is heat?
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Energy transferred between two objects because of a difference in the temperature of the objects
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How does heat flow?
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Heat flows from hot to cold
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What depicts how fast or slow energy gets transferred?
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The greater the difference in the temperature the faster the transfer happens
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What is conduction?
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Energy transfer due to objects touching
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What is convection?
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Energy transfer resulting from the movement of fluids (gas or liquid)
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What is a convection current?
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currents that form as hot fluids have a decrease in density and rise while cold fluids have an increase in density and sink
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What is radiation?
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Energy transfer due to electromagnetic waves
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What does radiation not tranfer?
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matter
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What are conductors?
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Energy transfer easily
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What are insulators?
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Energy doesn't transfer easily
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What are good conductors?
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Metals, (low specific heat values)
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What are good insulators?
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rubber, plastic, wood, styrofoam, air (high specific heat values)
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What is specific heat?
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the amount of energy required to raise the temp of 1kg of that substance by 1k or celcius.
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