Science 8 CBM 6 Review

Select all of the options that are compounds.

• Neon (Ne)

• Ozone (O₃)

• Water (H₂O)

• Nitrogen (N₂)

• Ammonia (NH₃)

Tags

NGSS.MS-PS1-1

Calcium carbonate (CaCO₃) is considered a compound because it is made up of two or more _____.

• molecules

• gases

• solids

• elements

Tags

NGSS.MS-PS1-1

Choose all of the phrases that apply to every compound.

• has a unique set of properties

• is a solid at room temperature

• made of two or more elements

• made of chemically joined atoms

• can be separated using physical means

Tags

NGSS.MS-PS1-5

Why are these changes classified as chemical changes?

• A) New substances are formed.

• B) Materials take different shapes.

• C) Temperature affects the objects.

• D) Some energy is absorbed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Lighting a match and baking a cake are two actions that involve chemical changes. Why are these actions considered chemical changes?

• A) They change the state of matter.

• B) They create new substances.

• C) They change volume.

• D) They create energy.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

During which step of this procedure does a chemical change occur?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Some molecules used to manufacture plastic objects are long and tangled. They straighten when force is applied to them and then return to their shorter, tangled shape. Which common object is most likely made using such molecules?

• helmet shells

• rubber bands

• plumbing pipes

• drinking cups

Tags

NGSS.MS-PS2-5

Which of the following manufactured products can be produced using petroleum as a raw material?

• plastic soda bottles

• aluminum cans

• glass vases

• copper pot

Tags

NGSS.MS-PS1-3

What is one way that synthetic fibers have changed society?

• They are engineered by humans so they are better materials for all applications.

• They are harder to make so they have limited the variety of products being sold.

• They are less expensive than natural fibers so they make products more available.

• They are available in unlimited amounts without depleting natural resources.

Tags

NGSS.MS-PS1-3

A student adds 50 g of sugar to two test tubes, 1 and 2. The student adds 50 mL of water in Test Tube 1 and 50 mL of sulfuric acid in Test Tube 2. The diagram shows the observations. What type of change occurs in Test Tube 1?

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2