Changes in Matter Unit 3

Julia is looking for examples of substances that will dissolve in water. She experiments with some things she finds in her kitchen at home. Which of these will NOT dissolve in water?

• jell-o powder

• black pepper

• salt

• sugar

Anna filled a cup with hot tea. Then she added a sugar cube. ​Which of these will help to make the sugar cube dissolve more quickly?

• adding ice cube to the tea

• adding more sugar cubes

• pouring more tea into the cup

• stirring the hot tea

Martha has a big box with a mixture of paper clips. Some are metal and some are plastic. Which is the best property for Martha to use to separate the metal paper clips from the plastic paper clips?

• magnetic attraction

• mass

• particle size

• shape

Cecil is going to investigate the effect water has on a steel nail. What type of change is he most likely investigating?

• bending

• burning

• melting

• rusting

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mr. Smith is going to show paper going through a chemical change. What can he do to the paper to cause the chemical change?

• burn it

• cut it

• draw on it

• tear it

Tags

NGSS.MS-PS1-2

Brody did only one trial of his experiment. What is the best reason why he should repeat his experiment?

• to be sure he used the fewest steps possible

• to check for accuracy

• to get a better grade

• to see whether another method gives the same results

Dina and Lawrence used some sugar cubes to make lemonade. How can they make the sugar dissolve more quickly?

• add ice cubes to the lemonade

• avoid stirring the lemonade

• break the cubes into smaller pieces

• use more sugar cubes

Lenny placed one sugar cube in a beaker with room temperature vinegar and one sugar cube in a beaker with hot vinegar. He observed the time it took for each sugar cube to dissolve. He found that the sugar cube in the room temperature vinegar dissolved in 3 minutes while the sugar cube in hot vinegar dissolved in 1 minute.

Which of the following is a conclusion that could be supported by evidence from his experiment?

• warmer vinegar dissolves sugar cubes faster

• salt would dissolve in vinegar in one minute

• sugar cubes would not dissolve

• temperature does not affect how fast substances dissolve

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Carla and Mike are using filter paper and a funnel to try to separate mixtures into their original parts.

Which mixture can be most easily separated using this method?

• salt and sugar

• sand and salt

• water and sand

• water and sugar

Four students made these different mixtures.

Whose mixture can most easily be separated by using the sifter shown above?

• Angelica's

• Cesar's

• Hank's

• Laruie's