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19 Cards in this Set
- Front
- Back
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What is density?
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the amount of matter in an object per unit of volume
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How is density written?
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g/cm3
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What happens to objects with less and more density?
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Less density- objects will float.
More density- objects will sink. |
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What is the formula for density?
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D= M divided by volume.
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What is mass?
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the amount of matter in an object.
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What is volume?
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the amount of space something has.
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What is matter?
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anything that has mass abd takes up space.
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What is Thermal Energy?
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The total amount of all particles in an object.
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What is heat?
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When thermal energy moves from a warmer object to a cooler object.
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What are the 3 ways heat transfers?
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Conduction, Convection, and radiation.
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What are convection currents?
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When part of the fluid has thermal energy added to it.
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Where do convection currents occur?
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in fluids.
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What happens to convection currents particles?
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The particles (atoms+molecules) move faster and get further apart.
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What happens when the particles get further apart? (convection currents)
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they become less dense and move to the top of the fluid. The fluid that is more dense sinks.
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What is conduction?
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The movement of Thermal Energy from particle to particle without the particles changing location.
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What happens to the particles? (conduction)
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They vibrate more and hit eachother, but stay in the same location.
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What must something have? (conduction)
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matter to transfer thermal energy.
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What is radiation?
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Transfers of energy through electromagnet waves.
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What doesn't radiation need? What can it do?
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-matter to transfer thermal energy
-can travel through empty space |
