Mixtures 5.5B 5th grade Science

A student made a mixture of equal parts salt and pepper. The salt grains were the same size as the pepper grains. What should the student do to most easily separate the pepper grains from the salt?

• Use a pair of tweezers to remove each grain of pepper

• Run a small magnet through the mixture to attract the pepper

• Put the mixture in water and filter the pepper out of the water

• Use a strainer with a fine wire screen to remove the pepper

A small bowl contains a mixture of toothpicks and glass marbles. The easiest way to separate the mixture without touching it would be...

• add glue to the mixture

• place a magnet in the bowl

• pour the mixture into a paper cone

• add water to the bowl

Tags

NGSS.MS-PS2-3

A student is given a beaker containing gravel and water. Which of these ways could the student NOT use to separate the gravel from the water? (5.5C)

• Boil the mixture to evaporate water.

• Pass a magnet over the mixture.

• Pour the mixture through a paper filter.

• Use tweezers

Students accidentally dropped a mixture of sand and iron filings into a cup of water. How could they quickly separate these three substances?

• Pour the mixture into a funnel with a filter.

• Put the mixture on a hot plate to evaporate the water.

• Pour the mixture through a filter, then use a magnet.

Which substances, when mixed together, keep their physical properties?

• salt and water

• sugar and lemon juice

• salt and pepper

All of the following are solutions EXCEPT...

• salt and water

• sugar and water

• water and oil

• lemon juice and water

How would you separate a mixture of sand and salt?. [Como separarias una mezcla de arena y sal?]

• Mix them with water and let the water evaporate. [ponla en agua y luego evapora el agua]

• Mix them with water, pour the mixture through a sieve, then let the water evaporate. [ponla en agua, usa un coladory evapora el agua]

• Heat the sand and salt mixture for 5 minutes, then let it cool. [calienta la sal y la arena por 5 minutos.

• I would not do any of these because none of these options would work. [ninguna de las opciones de arriba.]

A combination of rocks and water is an example of

• A mixture

• A solution

• Dissolving

A material that allows liquids to pass through it, while very small solids (like sand or iron filings) remain behind

• Filter

• Sieve

• Funnel

• Spoon

To make different without changing what the material is made of such as; cutting, folding,etc.

• Filter

• Physical State

• Physical change

• Physical matter