Ps1

Which statement BEST describes how the pieces compare to the completed model?

• Each piece is stronger than the completed model.

• The mass of the completed model equals the mass of all the pieces.

• Each piece is made from a different material than the completed model.

• The mass of the completed model is more than the mass of all the pieces.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Cherise mixed 30 grams of sugar into 100 grams of water. The sugar dissolved. Cherise recorded the data in the table below.

Based on the data in the table, find the mass of the sugar solution.

• A. 100 grams

• B. 108 grams

• C. 130 grams

• D. 200 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Malik weighed an empty beaker. The beaker weighed 50 grams. Then Malik added 115 grams of water to the beaker. He placed the beaker of water in a freezer until the water became solid ice. Which prediction should Malik make about the ice in the beaker?

• The ice will weigh less than 115 grams. After the ice melts, the water will weigh less than 115 grams.

• The ice will weigh less than 115 grams. After the ice melts, the water will weigh 115 grams.

• The ice will weigh 115 grams. After the ice melts, the water will weigh less than 115 grams.

• The ice will weigh 115 grams. After the ice melts, the water will weigh 115 grams.

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?

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

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

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

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

Tags

NGSS.MS-PS1-5

A student performs an experiment. The students wants to study the fastest way to dissolve sugar in tea. The student uses 50 milliliters of tea and adds 50 grams of sugar cubes for each trial. The student waits two minutes before making the observations shown in the table. How can the experiment be changed to be sure that as much sugar as possible has dissolved?

• Use larger sugar cubes in the 40 degree Celsius tea.

• Stir the tea constantly at all three temperatures.

• Use less water at all three temperatures.

• Use a larger cup to hold the 50 degree Celsius tea.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Mrs. Garza's class mixed some materials. They mad a table of the materials and the products after the materials combined.

Based on the table, which materials mixed to form a new substance?

• A. water and flour

• B. water and salt

• C. iodine and flour

• D. iodine and salt

Tags

NGSS.MS-PS1-2

A cup of sand is mixed into a bucket of rocks. Another cup of sand is mixed into a bucket of water. Which statement BEST compared the two buckets?

• A. Only the bucket with rocks is a solution because the materials must be chemically divided from the rocks.

• B. Both buckets are solutions because the materials must be separated by chemical means.

• C. Both buckets are mixtures because the materials can be separated by physical means.

• D. Only the bucket with water is a mixture because the sane can be dissolved by the water.

A type of cold pack has two separate sections inside. One section contains a liquid and the other section contains a powder. When the cold pack is squeezed, the section that holds the liquid breaks. When the liquid combines with the powder, the pack becomes very cold.

Which is the BEST explanation why the temperature of the pack decreases when the liquid and powder combine?

• A. A mixture forms.

• B. A solution forms.

• C. A chemical change occurs.

• D. Thermal energy is used.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Which of the following statements describes how solids interact with water? Select all that apply.

• All solids will dissolve in water

• Some solids will dissolve in water and others will not

• Temperature affects how quickly a solid dissolves in water

• The amount of water in a glass affects how quickly a solid will dissolve

Students collected data on the appearance of four substances and how they reacted when mixed with water. Which substances dissolved when mixed with water?

• A and B

• A and C

• B and C

• C and D

Tags

NGSS.MS-PS1-2