Solutions

To separate a mixture of salt and water what separation tool/method is used?

• Filter

• Screen

• Magnet

• Evaporation

When a powdered drink mix was added to water, the liquid turned orange. A student decided the taste was too strong, so he poured out half of the liquid and added more water. Which of the following most likely occurred when more water was added? (5.5C)

• The physical state changed.

• The orange color became lighter.

• The liquid had a sweeter taste.

• None of the above

Which of the following can be separated using the equipment shown above?

• A mixture of salt and pepper

• A mixture of pepper and water

• A mixture of oxygen and water

• A mixture of raisins and nuts

A student makes a drink stirring lemon juice and sugar into a glass of water. Why is this drink considered a solution?

• The lemon juice and sugar change the taste of the water

• The water changes the color

• The lemon juice and sugar dissolve in the water

• The student stirs the mixture

Read the paragraph. Which of the following is a chemical change?

• Mixing baking soda and vinegar together

• Mixing marbles and rocks together

• Putting ice cubes in a glass of water

• Dissolving salt in a beaker of water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Large deposits of salt are often found in deserts. For this salt to be usable, it must be separated from sand. If an engineer were designing a process to separate salt from sand, which of these differences would be the MOST useful?

• Salt and sand are different colors

• Salt dissolves in water, but sand does not

• Grains of sand are harder than grains of salt

• Grains of salt and grains of sand have different shapes

What process results from the spreading of sugar particles throughout water?

• Mixing

• Melting

• Dissolving

• Distributing

The graph shows what happened when salt was added to water in a glass. According to the graph, which of the statements are correct?

• Salt tastes different when water is heated.

• Salt will cause water to heat up faster.

• Salt is used to make hot water.

• Salt dissolves more easily in hot water.

Tags

NGSS.MS-PS1-4

When 5 grams of salt is added to 100 mL of water, which of the following changes will occur?

• The salt will float

• The water will crystallize

• The salt will dissolve

• The water will freeze

Tags

NGSS.MS-PS1-2

Students were preparing an experiment to determine the differences between a mixture and a solution. Before the experiment started, one student said, “I think the chicken broth is a solution.” This statement was an example of—

• a conclusion

• an observation

• an inference

• a hypothesis