Separating Mixtures

When a solid dissolves in a liquid, a _ _ _ _ _ _ _ _ is formed.

• solushun

• solution

• mixture

• soluble

Tags

NGSS.MS-PS1-2

When you are mixing a solid with a liquid, how do you know when the solid has completely dissolved?

• The liquid starts to fizz.

• You can't see any solid.

• The solid sinks to the bottom.

• The liquid goes cloudy.

Tom stirs sugar into a cup of iced coffee and times how long it takes to dissolve. He notices that when he stirs the same amount of sugar into a cup of hot coffee, the sugar takes . . .

• more time to dissolve.

• the same amount of time to dissolve.

• less time to dissolve.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When you separate a mixture, you . . .

• split it up into the different materials it was made from.

• mix two or more different materials together.

• pour it into different containers.

What are two uses for a sieve?

• to separate a mixture of two liquids

• to separate a mixture of a solid and a liquid

• to separate a mixture of similar-sized solids

• to separate a mixture of a gas and a liquid

• to separate a mixture of different-sized solids

2. 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 can be separated easily.

5. 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

12. Students 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 top of the water. The students are making—

• An Inference

• A Conclusion

• An Observation

• A Prediction

Tags

NGSS.MS-PS1-2

How can the oil and water be separated?

• SEDIMENTATION

• EVAPORATION

• DECANTATION

• FILTRATION

How are solutions made?

• by dissolving solids, liquids, or gases into another substance

• by mixing solids, liquids, or gases

• by separating solids, liquids, or gases

• by evaporating liquids