3/25 Solo Work

A student stirs salt into warm water until the salt can no longer be seen. Which statement best describes what happened to the salt?

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• It disappears forever, leaving only water.

• It is still present, spread evenly throughout the water.

• It reacts to form a new solid at the bottom. 

• It turns the water into a completely different substance.

Tags

NGSS.MS-PS1-4

A student mixes a sample of stones with a sample of table salt. The mass and volume of the samples were determined before mixing the samples. The mass and volume of each sample is shown.

Which statement is true about the mixture?

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• The mass of the mixture is 85 grams.

• The mass of the mixture is 60 milliliters.

• The volume of the mixture is 60 grams.

• The volume of the mixture is 85 millilers.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How can you prove that sugar stirred into water is still present, even if it can’t be seen? Write 1–2 sentences.

Tags

NGSS.MS-PS1-2

Which tool and method could easily separate Iron filings + sand?

• Magnet (pulls out magnetic substances)

• Filter or strainer (traps solids, lets liquid pass)

• Evaporation (removes liquid by turning it to gas)

Which tool or method is best to separate salt dissolved in water?

• Magnet (pulls out magnetic substances)

• Filter or strainer (traps solids, lets liquid pass)

• Evaporation (removes liquid by turning it to gas)

Which tool or method is best to separate sand + water?

• Magnet (pulls out magnetic substances)

• Filter or strainer (traps solids, lets liquid pass)

• Evaporation (removes liquid by turning it to gas)

A mixture of pebbles and marbles is placed in a bowl. Which statement best describes this mixture?

• Each item keeps its properties, like shape and color, and can be separated easily.

• The pebbles dissolve the marbles, forming a new substance.

• The marbles lose their color when touching pebbles.

• It becomes impossible to separate them with any tool.

A student has a cup of saltwater and sand. Describe one way to separate the sand and salt from the water. Write 2–3 sentences explaining how the method works.

Before mixing sugar into hot tea, a student recorded the observations shown in the table.

Which physical property of sugar will stay the same after the sugar is mixed with the hot tea?

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• Color

• Texture

• Mass

• Shape

Tags

NGSS.MS-PS1-2