Martina’s science class investigates mixtures and solutions. She uses beakers to measure and compare some mixtures and solutions. Which beaker contains a solution?

• A

• B

• C

• D

Compare two solutions. Water, drink mix, and sugar are mixed in a beaker. Hot water, instant coffee, and sugar are mixed in another beaker. Which substance do the two solutions have in common?

• drink mix

• water

• ice

• coffee

Bao is investigating mixtures and wants to explain how mixing substances affects stability and change in the substances. Bao has two solid substances. One is tiny white crystals. The other tiny black flakes. Bao mixes them with water. The white solid disappears, and the black solid floats to the top of the water. Which two solid substances does Bao most likely have?

• A. salt and pepper

• B. milk and iron filings

• C. white and black sand

• D. sugar and powdered drink mix

Tags

NGSS.MS-PS1-2

Paul has two unlabeled containers filled with mystery liquids. He knows one is vinegar, which dissolves in water. He knows the other is oil, which mixes but does not dissolve in water. In what order should he complete the steps to identify the liquids? Put the steps in the correct order.

• Pour 10 milliliters of each mystery liquid into each cylinder of water, stir.

• Observe the water for changes.

• Measure 10 milliliters of water into each of two graduated cylinders.

• Record the results.

• Make a hypothesis.

Tags

NGSS.MS-PS1-2

During a classroom investigation, a student must mix two chemicals in a glass container to cause a reaction. Which safety precaution should the student take?

• keep long hair pulled back

• avoid touching any materials

• mix the chemicals together quickly

• smell the chemicals to make sure they are fresh

Which of the following is an example of a solution?

• dry cereal

• lemonade

• trail mix

• oil and water

Which of the following is an example of a solution?

• dry cereal

• Kool-aid

• potato chips

• sand and water

The image shown is an example of a ___________.

• solution
• mixture
• gas
• plasma

A solution is a mixture of one or more substances _________ evenly into another substance.

• dissolved
• evaporated
• carried
• split

Mixtures can be identified and compared. What do ALL mixtures have in common?

• They are a combination of substances that give off a gas.

• They are any type of matter that can change its shape or color.

• They are any type of matter that evaporates when heat is added.

• They are a combination of two or more substances that keep their identities.