SOL 5.7 Exploring Matter and Energy Interactions

A student mixes sand and iron filings in a beaker. Which statement best describes what happens to the physical properties of the sand and iron filings after mixing?

• The sand and iron filings form a new substance with different properties.

• The sand and iron filings keep their original physical properties.

• The sand dissolves in the iron filings.

• The iron filings change color.

Which of the following is an example of a mixture where the substances retain their physical properties?

• Salt dissolving in water

• Oil and water combined in a bottle

• Baking soda reacting with vinegar

• Burning wood

A scientist wants to separate a mixture of gravel, sand, and salt. Which method would best allow her to separate all three substances while keeping their physical properties unchanged?

• Use a magnet, then dissolve in water, then filter

• Burn the mixture

• Freeze the mixture

• Mix with vinegar

If you mix marbles and rice in a bowl, which property allows you to separate them easily?

• Color

• Size

• Smell

• Taste

Tags

NGSS.5-PS1-3

A student mixes sugar and sand together. Which of the following best explains how the mixture can be separated using the scientific method?

• Add water to dissolve the sugar, then filter out the sand, and evaporate the water to get the sugar back.

• Heat the mixture until it burns.

• Freeze the mixture.

• Add oil to the mixture.

Tags

NGSS.MS-PS1-2

Which of the following is NOT a mixture?

• Salad

• Lemonade

• Rust

• Trail mix

A teacher asks students to design an experiment to test if mixing gravel and water changes the physical properties of either substance. Which step should come first in their scientific method?

• Record the results

• Make a hypothesis

• Mix the substances

• Draw a conclusion

Which of the following mixtures can be separated by using a filter?

• Salt and water

• Sand and water

• Sugar and water

• Vinegar and water

A student observes that when she mixes pebbles and marbles, both can be separated easily. What does this observation tell us about the physical properties of the substances?

• Their physical properties have changed.

• Their physical properties remain the same.

• They have formed a new substance.

• They have dissolved in each other.

You are given a mixture of iron filings and salt. Describe a step-by-step plan to separate them and explain why each step works.

• Use a magnet to remove iron filings, then dissolve salt in water and evaporate the water.

• Burn the mixture to separate the substances.

• Freeze the mixture to separate the substances.

• Add oil to the mixture to separate the substances.

Tags

NGSS.MS-PS1-2