S6E1

Which model shown above best represents the element neon as a gas?

• Model A

• Model B

• Model C

• Model D

Tags

NGSS.MS-PS1-4

A student had a beaker with a small amount of baking soda. The student added a few drops of pickle juice to the baking soda and observed fizzing and bubbling.

Based on observation, which of these can the student conclude?

• A chemical reaction produced a solid.

• No chemical reaction took place.

• Only a physical change happened.

• A chemical reaction produced a gas.

Tags

NGSS.MS-PS1-2

Which column in the table includes only chemical changes?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Students performed an investigation to see what would happen when sugar is exposed to heat. The students’ observations are listed below. Which students’ observations indicate that a new substance formed as a chemical change occurred?

• Student A and Student C

• Student B and Student C

• Student A and Student D

• Student B and Student D

Tags

NGSS.MS-PS1-2

After an investigation, students were disposing of leftover substances. One student poured all of the liquids down the sink drain. A few seconds later, a white cloud formed above the sink, and the student’s eyes began to burn.

Which statement accurately describes what caused this occurrence?

• The student did not wait two minutes in between pouring each liquid down the drain.

• The student did not allow water to run in the sink after pouring each liquid down the drain.

• A physical change occurred resulting in the formation of a new substance.

• A chemical change occurred resulting in the formation of a new substance.

Tags

NGSS.MS-PS1-2

Which statement best explains why the characteristics of table salt are so different from the characteristics of sodium and chlorine?

• Salt is processed by the evaporation of seawater or mineral-rich spring water.

• Salt is processed from salt mines because pure sodium does not occur in nature.

• When sodium and chlorine combine, a physical change occurs and a new substance is formed.

• When sodium and chlorine combine, a chemical change occurs and a new substance is formed

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which of the following correctly represents an element?

• Water – H2O

• Copper – Cu

• Carbon monoxide – CO

• Salt – NaCl

Which of the following substances represents an element?

• 2, 3, 5, and 6

• 2, 5, and 6

• 1 and 4

• 1, 3, and 4

Tags

NGSS.MS-PS1-1

Which of the following substances represents a compound?

• 2, 3, 5, and 6

• 2 and 6

• 1 and 4

• 1, 2, 3, and 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Compounds are pure substances. What other substances are considered pure substances?

• Chemical reactions

• Elements

• Mixtures

• Solutions