Matter and Their Interactions

A student poured vinegar into a bowl with baking soda.

When the vinegar and baking soda combine, bubbles appear because

• A. a mixture forms

• B. a new gas forms

• C. the vinegar is a liquid

• D. the baking soda dissolves

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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-PS1-2

NGSS.MS-PS1-4

A student poured five different clear, colorless liquids into five different beakers. Each beaker was half-filled with the liquid. The student added 1 gram of a white powder and stirred each mixture. The student's observations are recorded in the data table.

In which two mixtures was a new substance formed?

• Mixture 1

• Mixture 2

• Mixture 3

• Mixture 4

• Mixture 5

Tags

NGSS.MS-PS1-2

Students completed four investigations where they combined two different substances.

Which investigation shows evidence that the chemical properties of the substances changed?

• Vegetable oil coats the surface of lettuce when oil and lettuce are combined.

• Salt dissolves in water when salt and water are combined.

• Sand sinks in water when water and sand are combined.

• Bubbles form when baking soda and vinegar are combined.

Tags

NGSS.MS-PS1-2

The diagram shows water particles in three different phases.

On a summer day, water particles from the ocean change phase as they move into the air. Which of the following models best shows this process?

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Tags

NGSS.MS-PS1-4

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

At which two temperatures is water MOST likely to be in vapor form and a solid form?

• 70 degrees Celsius

• 120 degrees Celsius

• -10 degrees Celsius

• 90 degrees Celsius

• 20 degrees Celsius

Tags

NGSS.MS-PS1-4

Which picture BEST shows what change occurs when heat is added to ice?

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Tags

NGSS.MS-PS1-4

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.

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

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-PS1-2

NGSS.MS-PS1-5