Science conduction, convection, radiation – Flashcards
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types of heat transfer
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Conduction, convection, radiation
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what is conduction?
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conduction is transferred heat. you must be touching for this to work. e.g. put ice in your hand and it melts. that is called conduction. the heat from your hand transferred to the ice, melted it.
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what is convection?
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Convection is a hot gas or liquid that becomes less dense. Cold gas and liquids become more dense.
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what is radiation?
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radiation is the electromagnetic waves that give off heat. for instance, a microwave, a light bulb, or a fire.
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when something feels cold, is energy leaving or staying?
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leaving
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when something feels hot, is energy leaving or staying?
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staying
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why is cold water more dense than hot water?
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The molecules in cold water aren't moving, and are clustered together, making the water denser. The molecules in hot water are moving quickly and are less clustered, therefore less dense
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if a heat lamp is pointed on the table, what will happen to the table?
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The table will get hotter
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which do you think is colder, tile floor in a 22〫C room or a rug in 22〫C?
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The tile floor. The floor was (in my experience) 21〫C and the rug was 23
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Which of these has electromagnetic waves? a microwave, a tree, a nuclear bomb, the sun, a blender, or a light?
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a microwave. a nuclear bomb (yes a nuclear bomb!), the sun, and a light
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name some types of energy (if your energy isn't on the list than congrats you know more than i do!)
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kinetic energy- something moving, like a baseball fling through the air potential energy- something that could move, like a book on the table, if pushed than it could fall off. it has a chance to become kinetic, but only if pushed thermal/heat energy-something that gives off heat, like a cup of coffee electromagnetic energy (light)- Light that has traveled billions of light years to get here nuclear energy-reactions that involve changes in the structure of the atoms
