Mixtures and Solution STAAR Bootcamp

Which substance when mixed together, maintain their original physical properties?

• Gravel and water

• Wood chips, water, and sand

• Sand and water

• All of the above

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NGSS.5-PS1-3

NGSS.5-PS1-4

A student stirs a mixture of sand, iron filings, and water and observes that eventually the sand and iron filings sink to the bottom of the container. How can the student separate the mixture?

• Slowly pour the mixture into another container, making sure the sand does not flow out with the water. Pick the iron out with tweezers.

• Pour the mixture into a pot and heat one minute. Spoon the sand from the water. Use a magnet to remove the iron.

• Pour the mixture through a coffee filter, leaving only the sand and iron in the filter. Separate the sand and iron with a magnet.

• Use a spoon and scoop out as much sand as possible. Drag a magnet through the water to remove the iron.

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NGSS.3-5-ETS1-2

NGSS.3-PS2-4

NGSS.5-PS1-3

All of the following are examples of containers filled with mixtures EXCEPT -

• a jar filled with trail mix

• a glass filled with water

• a bowl of cereal with milk

• a cup of fruit salad

A student makes a garden salad by stirring lettuce, tomatoes, carrots, and croutons together in a bowl. Why is the garden salad a mixture?

• The student cut the vegetables into equally sized pieces.

• The vegetables are combined but maintain their physical properties.

• The croutons cannot be taken out of the salad.

• The salad grew from a garden.

Tags

NGSS.5-PS1-4

Which mixture can be separated using a filter?

• Sand and iron filings

• Saltwater

• Sand and water

• None of the above

Tags

NGSS.5-PS1-4

A cup of orange juice with pulp is poured into a glass. Which of these procedures could be done to separate the juice from the pulp?

• Pour the juice with pulp through a coffee filter

• Heat the juice in a pot until boiling

• Pour the juice in another cup

• Allow the mixture to settle, leaving the pulp at the bottom of the glass

All of these can be separated easily EXCEPT -

• nuts, bolts, and screws

• powdered drink mix, sugar, and water

• sand and water

• iron filings and sand

Tags

NGSS.5-PS1-4

Which tools are best for separating a mixture of sand, iron filings, and water?

• Hot plate and filter

• Tweezers and filter

• Filter and magnet

• Magnet and hot plate

Tags

NGSS.3-PS2-4

NGSS.5-PS1-3

A packet of trail mix has raisins, nuts, granola, and cranberries. Which statement correctly describes the trail mix?

• The trail mix is a mixture because it contains an equal number of nuts and raisins.

• The trail mix is a mixture because the ingredients dissolve in water.

• The trail mix is a mixture because the ingredients cannot be separated.

• The trail mix is a mixture because the ingredients maintain their physical properties.

Tags

NGSS.5-PS1-4

Student are investigating a mixture of oil and water. They notice when the mixture is stirred vigorously, it appears to mix evenly, but after letting the mixture rest, the oil floats on the top of the water. Why does the oil float on the top of the water?

• The oil is more dense than water.

• The oil weighs less than water.

• The oil is soluble in water.

• The oil is not soluble and is less dense than water.

Tags

NGSS.5-PS1-4