Mixtures and Solutions

A combination of rocks and water is an example of

• A mixture
• A solution 
• Dissovling

Which of the following is NOT a mixture?

• sand, salt, and rocks in a bucket
• trail mix made with dried fruit,
  nuts, chocolate drops, and
  pretzels
• water in a glass
• rocks and sand in the ocean

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

• mixture
• solution
• solute
• solvent

A science class performed an investigation by evaporating a solution containing 10g of salt and 50ml of water. How much salt would you expect to find in the cup at the end of the investigation?

• 60g

• 50g

• 10g

• 5g

Which of the following tools could be used to quickly separate a mixture of iron paperclips and sand particles?

• Magnet

• Hot Plate

• Microscope

• Hand Lens

What happens when water mixes with sugar?

• the appearance of sugar changes

• the shape of water changes

• the taste of sugar changes

• the state of water changes

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

What tool would best help you sort iron bolts from aluminum bolts?

• 
• 
• 
• 

What property of water changes after creating a solution of lemon juice and water?

• shape

• temperature

• taste

• state

Which set of procedures would be best to follow when separating a mixture of sand, salt, and water?

• 1. Evaporate the liquid to separate water
  2. heat solid mixture to separate salt
• 1. pour mixture through filter to separate sand
  2. evaporate liquid to separate salt
• 1. pour mixture into bowl to separate water
  2. use hand lens to separate sand
• 1. heat mixture on hotplate to separate sand\
  2. cool liquid to separate sand