01. INTRODUCTION TO CHEMISTRY

1. A possible solution to a scientific problem is known as:

• an experiment

• an observation

• a conclusion

• a hypothesis

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NGSS.MS-LS1-5

State of matter could be an example of data that is:

• numeric

• qualitative

• quantitative

• hypothesized

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NGSS.MS-PS3-4

The temperature at which a substance changes from a liquid to gas could be data that is:

• quantitative

• qualitative

• hypothesized

• concluded

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NGSS.MS-PS1-4

Developing a new drug to cure a disease is an example of:

• medicine

• scientific method

• pure science

• applied science

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NGSS.MS-LS1-5

NGSS.MS-ETS1-4

Of the following name/symbol combinations of elements, which one is WRONG?

• uranium / U

• sulfur / S

• nitrogen / N

• iodine / Io

Chemical changes are changes that become something new with a new formula. Which answer includes all the following that are chemical changes and not physical changes?

I. freezing of water

II. rusting of iron

III. dropping a piece of iron into hydrochloric acid (H₂ is produced)

IV. burning a piece of wood

• III and IV

• II and V

• II, III, and IV

• all are chemical changes

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The building block of matter is:

• cell

• proton

• atom

• molecule

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NGSS.MS-PS1-1

Which of the following is the correct pair?

• Sodium, So

• Fluorine, Fl

• Tin, Sn

• Carbon, Cb

Chemical formulas provide information such as:

• types of atoms and number of each

• types of reactions

• energy released by substances

• the state of matter

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NGSS.MS-PS1-1

The Periodic Table is a list of existing:

• elements

• compounds

• mixtures

• substances