HS PS

The pictures show butter and water in solid states. The melting point of each substance is shown.

Students put solid butter and solid water on a table. The air temperature around the table is 20 degrees Celsius.

Which statement describes the most likely state of each substance after two hours?

• A. The butter and water will both become liquids.

• B. The butter will remain a solid, and the water will become a liquid.

• C. The butter and water will both remain solids.

• D. The butter will become a liquid, and the water will remain a solid.

Tags

NGSS.MS-PS1-4

Substances have different freezing and boiling points. These values help scientists know when phase changes happen.

Which three substances will have a phase change if the temperature goes up from 50 degrees Celsius to 300 degrees Celsius?

• phosphorus

• potassium

• sodium

• gallium

• rubidium

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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-ESS2-4

NGSS.MS-PS1-4

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

NGSS.MS-PS3-4

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

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Tags

NGSS.MS-PS1-4

Veronica weighed an empty bowl and recorded its mass. Then she placed three ice cubes in the bowl and weighed it again. After the ice melted, she recorded the mass of the bowl and the water. She put the data in a table.

What conclusion should Veronica make from her observations?

• A. The masses of the water and the ice were both 43 grams, so the amount of matter did not change.

• B. The masses of the water and the ice were both 153 grams, so the amount of matter did not change.

• C. Some of the water spilled because the mass of liquid water should have been greater than the mass of solid ice.

• D. There was an error in weighing the ice because the mass of liquid water should have been less than the mass of solid ice.

Tags

NGSS.MS-PS1-5

A glass of ice water is placed on a table inside a room that is at room temperature. The ice inside the glass melts. The diagram represents the changes observed.

Which piece of evidence supports the conservation of matter during the changes shown in the diagram?

• A. The contents of the glass are wet before and after the ice melts.

• B. The combined mass of the glass and its contents is the same before and after the ice melts.

• C. The combined mass of the glass and its contents is less after the ice melts.

• D. The contents of the glass are colorless before and after the ice melts.

Tags

NGSS.MS-PS1-5

Chris fit the pieces of a space shuttle model together.

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

• A. Each piece is stronger than the completed model.

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

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

• D. 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

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