What happens to the solute when it is stirred into a solvent?
It dissolves.
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15
What is transpiration?
It is when water evaporates from the leaves of plants.
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10
Give an example of a solute.
salt, sugar, coffee powder (any solid that can be dissolved)
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25
Explain the process of evaporation.
It happens because some particles in the liquid gain heat energy making them move faster and further apart until they escape from the surface of the liquid.
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15
What is the boiling point of pure water?
100 degrees Celcius.
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trap
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seesaw
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fairy
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lifesaver
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15
What do we get when we mix a solute and a solvent?
A solution.
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banana
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gold
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gift
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lifesaver
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20
Explain the process of melting using the particle model.
When heated, the particles gain energy, move more quickly, and pull further apart. With enough energy, they escape from the solid and change into a liquid.
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10
What is evaporation?
It is when a liquid turns into a gas.
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lifesaver
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fairy
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rocket
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lifesaver
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15
Explain the process of condensation.
When gas particles cool down and lose energy they change into a liquid.
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15
Fahrenheit, Celcius, and Kelvin all invented a different scale to measure the same thing. What were they measuring?
Temperature.
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15
Name two factors that speed up evaporation.
wind and heat.
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15
On Kelvin's temperature scale, what did he call -273 degrees Celcius?