Mixtures and Solutions

Which one of the following solids is insoluble (not soluble) in water?

• sugar
• sand
• copper sulfate
• salt

The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as

• decanting
•  evaporation
• loading
• chromatography

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

• a bar magnet
• filter paper
• chromatography paper
• alum

Boiling point is a point at which liquid turns in to..

• solid
• liquid
• molten
• gas

A combination of 2 or more substances that can be easily separated is called- 

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

A combination of two or more substances that cannot easily be separated--

• mixture
• solution
• solute
• solvent

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

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

Lemonade is a special mixture called a 

• substance
• solution
• plasma
• ingredient

To separate the sugar and lemonade, what method should you use?

• filtration 
• sorting
• magnet
• boiling