8Ee Still Water

Pure water is:

• water which is clean enough to drink.

• water which runs off the hills.

• rain.

• water with nothing dissolved in it.

The two steps in distillation are:

• filtering followed by evaporation.

• evaporation followed by condensation.

• condensation followed by filtering.

• filtering followed by condensation.

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NGSS.MS-PS1-4

Distillation works because:

• only water particles evaporate from a solution.

• the water particles are too big to evaporate.

• condensation turns a liquid into a gas.

• salt particles are dissolved in the water.

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Distillation cannot be used to:

• separate sand from sugar.

• make drinking water in emergencies.

• make pure water from sea water.

• make clean water from inky water.

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NGSS.MS-PS3-4

What is another name for water vapour?

• stream.

• ice.

• steam.

• ice cubes.

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NGSS.MS-ESS2-4

What is condensation?

• changing from a liquid to a gas.

• changing from a gas to a liquid.

• changing from a solid to a liquid.

• changing from a liquid to a solid.

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NGSS.MS-PS1-4

Steam irons need to be filled with pure water and not tap water.

• True.

• False.

What is the boiling point of pure water at sea level?

• 50°C.

• 80°C.

• 100°C.

• 150°C.

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NGSS.MS-PS1-4

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Which of the following liquids would be easiest to separate using distillation?

• Water and oil.

• Salt and water.

• Sand and water.

Which piece of equipment is not typically part of a simple distillation setup?

• Flask.

• Beaker.

• Liebig Condenser.

• Filter paper.