Mixtures and Solutions

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

Mixtures are combinations of two materials that retain their physical qualities.

• True
• False

Which of the following is a method of separating solutions?

• hand seperation
• filtering
• screening
• evaporation 

A combination of 2 or more substances that cannot be easily separated is called- 

• a mixture
• a solution 
• a solute 
• a solvent 

To separate a mixture of salt and water what separation tool/method is used?

• Filter
• Screen
• Magnet
• Evaporation

If you spilled nails in a sandbox, what separation tool/method could you use to clean out the sandbox so it would be safe for children to play in?

• Filter
• Screen
• Magnet
• Evaporation

Trail mix, with nuts, raisins, pretzels and candy pieces is a good example of a mixture.

• True
• False

• True
• False

Which of the following will NOT dissolve in water?

• salt
• rocks
• apple juice