5.5C Solutions 1

Which of the following is the correct scientific definition of a solution?

• A means of solving a problem or dealing with a difficult situation

• A homogeneous mixture of two or more substances; all substances must be completely dissolved into each other

• Two or more substances are chemically combined and cannot be easily separated

• Two or more substances are combined, but they keep their original properties and can be easily separated

Which of the following is an example of a solution?

• Oil and water

• Oil and vinegar

• Vinegar and water

• Water and sand

Which of the substances listed below will form a solution when mixed with water?

• Sand

• Lemon Juice

• Oil

• Pepper

Tags

NGSS.MS-PS1-2

Which of the following is the correct definition of evaporation?

• When one substance completely dissolves into another substance and appears to disappear

• When a gas or vapor changes into a liquid

• When a liquid changes into a gas or vapor

• When two or more substances are chemically combined and cannot be easily separated

  
  

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A student is making lemonade by mixing powdered lemonade mix into a pitcher containing 500 mL of water. Which amount of lemonade mix will produce the strongest tasting lemonade?

• 50 g

• 100 g

• 150 g

• 25 g

A student makes hot chocolate by mixing two scoops of hot chocolate powder into a mug of hot water. He does not finish his drink and leaves the mug sitting on the counter for the weekend. What does the hot chocolate in the mug most likely look like after the weekend?

• The hot chocolate evaporated, leaving the water behind in the mug.

• The mug is empty because the hot chocolate evaporated.

• The water evaporated, leaving the dried hot chocolate powder in the mug.

• The mug looks exactly the same.

  
  

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A teacher shows some students a solution of sugar and water in a beaker. Then she adds four ice cubes to the solution. All the following properties of the solution change as the ice cubes melt except –

• the mass

• the temperature

• the volume

• the physical state

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

All of the following substances will dissolve when mixed with water except –

• salt

• oil

• sugar

• lemon juice

Tags

NGSS.MS-PS1-2