Pure Substances, Mixtures, and Chemical Bonds Questions

Which is evidence that a chemical reaction has occurred?

• A precipitate forms in a milk vinegar reaction

• a phase change occurs

• red and yellow paint mix to produce a different color

• a pot of water reaches a boiling point

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Oxygen, Gold, Neon, Iron, Sodium are all examples of

• Mixtures

• Pure Substances

• Molecules

• Physical properties

Which is an example of a chemical change?

• a brand new PS5 melts in a furnace

• Water vapor condenses into clouds

• Mario squishes a goomba

• A brand new bike begins to rust after sitting outside

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

H2O; OH; FeO2....These may all be classified as

• elements and compounds

• elements and molecules

• elements and pure substances

• compounds and pure substances

Tags

NGSS.MS-PS1-1

The diagram shows Substance U being formed, then separated back into its parts. Use the diagram to answer any questions that follow. Based on the methods used to separate the substance into its parts, is Substance U a compound?

• No, it is a mixture, because physical methods were used to separate its parts.

• No, it is a mixture, because chemical methods were used to separate its parts.

• Yes, it is a compound, because physical methods were used to separate its parts.

• Yes, it is a compound, because chemical methods were used to separate its parts.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

The picture below shows Kelsey's glass of ice water. Which of the following is correct about Kelsey's glass of ice water?

• It is a mixture now because the water and ice can be seen in the glass, but it will not be a mixture when the ice cubes melt.

• It is not a mixture now because the ice is floating on the water, but it will be a mixture when the ice cubes melt.

• It is not a mixture because ice and water are the same thing in two different states.

• It is a mixture because ice and water are two different things in two different states.

Tags

NGSS.5-PS1-4

The picture below shows four liquids: tea, water, orange juice, and fruit punch. Which of the liquids are mixtures?

• Tea, Orange juice, and Fruit punch

• Orange juice and Fruit punch, only

• Tea, Water, and Fruit punch

• Water and Tea, only

The picture shows five jars containing a variety of objects. Use the picture to answer any questions that follow. If Jar I is poured into Jar J, it will form

• a mixture.

• a solution.

• a molecule.

• a compound.

Tags

NGSS.MS-PS1-2

The relationships among various types of matter are shown below. Which label would be most appropriate for Box 2?

• Atoms

• Mixtures

• Solutions

• Pure Substances

Jasmine has been reading about mixtures and how they can be classified. After reading that a solution is a homogeneous mixture, she wondered about her favorite morning drink, grape juice. Which statement about the solution that makes up grape juice is true?

• Sugar is the solvent and water is one of the solutes.

• Water is the solvent and sugar is one of the solutes.

• Grapes are the solvent and water is one of the solutes.

• Sugar is one of the solvents and grapes are one of the solutes.