Flashcards
Heat and Temperature
Flashcards do conjunto (17)
- 1tempreturehow hot something is,NOT how much heat energy is in it
- 2temperature measured indegrees Celcius
- 3heat energy measured injoules(j)
- 4the amount of heat energy in something depends on:-how hot it is
-the material it is made from
-its mass - 5particle model of matterexplains how some forms of heat energy travel. it suggest that everything is moving/vibrating. when the particles are heated they move faster and further, so they take up more room therefore the material expands.
- 6heat energy is transmitted in three different ways:conduction
convection
infrared radiation - 7convection=takes place in solids and can also happen in liquids(not aswell). when they gain energy they vibrate faster and further, and the vibrations are passed on. METALS are the best conductors.
- 8convection=It takes place in fluids. When the air near the fire is heated, the particles spread further apart and the air becomes less dense and rises. As it rises it meets cooler air and passes the energy on. Having passed on the energy, it cools and becomes denser. The denser air sinks, setting up a cycle or CONVECTION CURRENT.
- 9infrared radiation=Infrared radiation can transfer heat energy through empty space. Radiation does not require the movement of particles. Any hot or warm object gives of radiation.
- 10three states of matterliquid,gas,solid
- 11solid to liquidmelting
- 12liquid to gasevapouration
- 13gas to liquidcondensing
- 14liquid to solidfreezing
- 15the melting point and the freezing point are.....the same temperature
- 16TRUE OR FALSE the temperature of a substance does not change while it is melting,even if it is still being heatedTRUE
- 17—
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- Year 8 Physics FlashCards sobre Heat and Temperature, criado por Billie P em 10-03-2018.
- Criado por
- Billie P
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