Download - Discovering science 1
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Discovering Science Discovering Science
P5P5
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Evaporation
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DescriptionDescription When warm water When warm water
vapour from the vapour from the surrounding air surrounding air touches the colder touches the colder surface of the glass, surface of the glass, loses heat and loses heat and condenses into water condenses into water droplets on the outer droplets on the outer surface of the glass. surface of the glass.
Cold waterCold water
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DescriptionDescription
When the warm When the warm water vapour from the water vapour from the hot water rises and hot water rises and touches the colder touches the colder surface of the plastic surface of the plastic wrap,loses heat and wrap,loses heat and condenses into water condenses into water droplets on the inner droplets on the inner surface of the plastic surface of the plastic wrap.wrap.
Hot waterHot water
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DifferenceDifference
Process:Process:EvaporationEvaporation
CondensationCondensationFreezingFreezingMeltingMeltingboilingboiling
States:States:LiquidLiquidSolidSolid
gaseousgaseous
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The processThe process
Evaporation-Evaporation-gains heatgains heatCondensationCondensation-loses heat-loses heatFreezingFreezing-loses heat -loses heat MeltingMelting-gains heat-gains heatBoilingBoiling-gains heat-gains heat
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SolidSolid
Inside the solid, the particles are very Inside the solid, the particles are very squeezysqueezy!!That is why solid has a definite shape That is why solid has a definite shape
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LiquidLiquid
Inside the liquid, the particles are not so Inside the liquid, the particles are not so squeezysqueezy! !
It can move quite freely around.It can move quite freely around.
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AirAir
Inside the air, the particles can move Inside the air, the particles can move freelyfreely
That’s why we cannot see and it can be That’s why we cannot see and it can be compressedcompressed
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