S8P1A

S8P1a Which of the following is an example of a pure substance?

• a sample of oxygen gas

• a solution of sugar water

• a mixture of pasta and sauce

• an alloy of iron and carbon in concrete

S8P1a An unknown substance is provided in a science class. It consists of particles that are different colors and different sizes. The particles are unevenly distributed throughout the substance. The substance is ___________.

• an element

• a compound

• a homogeneous mixture

• a heterogeneous mixture

The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds?

• aluminum and iron

• iron and sodium chloride

• carbon dioxide and aluminum

• sodium chloride and carbon dioxide

Tags

NGSS.MS-PS1-1

Which image(s) would be considered pure substances?

• V

• I and II

• II and IV

• III and V

Tags

NGSS.MS-PS1-1

Identify which images are HETEROGENEOUS MIXTURES! (Check all that apply)

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Identify which images are PURE SUBSTANCES! (Check all that apply)

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Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

• heterogeneous

• homogeneous

• pure

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

Which of these are a heterogeneous mixture?

• Trail mix

• Air

• Salt Water

• Cool-aid

This flask in the image is holding molecules of a gas. Which statement best describes what will occur if enough thermal energy is removed from the system to cause a change in state?

• Molecular energy will increase, and the substance will change from a liquid to a gas

• Molecular energy will increase, and the substance will change from a gas to a liquid.

• Molecular energy will decrease, and the substance will change from a liquid to a gas.

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  Molecular energy will decrease, and the substance will change from a gas to a liquid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4