Mixtures and solutions

Salt can be separated from water by using

• tweezers

• sieve

• magnet

• evaporation

Salt and pepper would be an example of a

• mixture
• solution

Combination of two or more different kinds of substances that keep their own physical properties and can be easily separated.

• Solution

• Mixture

• Solubility

• Miscibility

You know that a substance has dissolved when it-

• becomes a solid
• produces condensation and has water droplets 
• spreads evenly throughout a liquid

If I added 27 grams of salt to water and separated the solution with a hot plate, what amount of salt would be left behind?

• 20 grams
• 0 grams
• 27 grams
• 10 grams

Which one of the following would you use to separate sand from iron filings?

• a bar magnet

• filter paper

• hot plate

• strainer

A solution is a mixture of one or more substances _________ evenly into another substance.

• dissolved
• evaporated
• carried
• split

A mixture is always a solution, but a solution is NOT always a mixture. 

• True
• False

How would you separate a mixture of sand and salt? 

• Mix them with water and let the water evaporate
• Mix them with water, pour the mixture through a sieve, then let the water evaporate
• Heat the sand and salt mixture for 5 minutes, then let it cool
• I would not do any of these because none of these options would work

A tablespoon of a substance is added to warm water and stirred. The result was that the substance could no longer

be seen.

We can conclude from the results that the substance –

• is less dense that water

• heated the water

• flavored the water

• dissolved in water