P. 2.6

Mrs. Jones wants to prove to her students that when an object is burned, its total mass is the same before and after the reaction. What should Mrs. Jones do to make sure this is shown by the experiment?

• burn the object in a closed container

• burn the object outside on a nice day

• add water to the object after it is burned

• split the object into two equal pieces before burning

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Figure 1 diagram shows an ice cube in a cup. Figure 2 shows the ice cube melted to water in the cup. Which property of the ice cube remains the same both before and after it melted?

• color

• shape

• mass

• temperature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mike dissolves some sugar in water and pours 10 ounces of the mixture into a jar with a lid to create rock candy. Which is most likely the weight of the mixture after it crystallizes into rock candy?

• 0 ounces

• 5 ounces

• 10 ounces

• 12 ounces

Tags

NGSS.MS-PS1-5

An ice cube melts and then evaporates. The ice cube and the water vapor have the same

• mass

• density

• volume

• temperature

List the steps of the scientific method

d

e

f

c

b

a

Form a hypothesis

Conduct experiment

Ask a question

Communicate results

Analyze results

Draw conclusions

Tags

NGSS.MS-LS1-5

NGSS.MS-PS2-2

Identify an example of each of the three states of matter present when the candle is burning.

• The melting wax

• Liquid

• The hard wax of the candle

• Solid

• The fire/flame

• Gas

Tags

NGSS.MS-PS1-4

Mrs. Champion’s class performed an experiment in which they combined 10 ounces of lemon juice with 15 ounces of vinegar to create a new cleaning solution. The experiment was conducted in a sealed spray bottle weighing 5 ounces. The students weighed the bottle with the solution immediately following the experiment. What did the students most likely discover about the weight of the solution and the bottle?

• It weighed 25 ounces because the solutions mixed and dissolved the bottle.

• It weighed 10 ounces because some of the solution dissolved when it was combined.

• It weighed 60 ounces because the solutions doubled in quantity when mixed together.

• It weighed 30 ounces because the solutions mixed and everything was contained inside the closed bottles.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A teacher adds 2 g of chalk to 25 g of vinegar in a tightly sealed jar. The chalk and vinegar react, and gas bubbles form. What is the total mass of the jar’s contents after the reaction takes place?

• 50 g

• 27 g

• 23 g

• 25 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A group of students weighed a sealed jar full of heavy cream. Then they shook the jar until the cream separated, and then they weighed the jar again. Which of the following would BEST describe its weight?

• a. The jar will have gained weight because some liquid changed to a solid.

• B. The jar will have gained weight because shaking added energy to it.

• C. The jar will have lost weight because of friction from shaking the liquid.

• D. The jar will have kept the same weight because it did not gain or lose any matter.

Tags

NGSS.MS-PS1-5

The mass of a grape drink mixture is 150 grams. Kathy boils the mixture and notices that 50 grams of water has evaporated. Which will most likely be the result?

• The mass of the grape juice mixture will be 50 grams.

• The mass of the grape juice mixture will be 100 grams.

• The mass of the grape juice mixture will be 200 grams.

• The mass of the grape juice mixture will remain 150 grams.

Tags

NGSS.MS-PS1-5