Mandatory Assessment Re: Scientific Method, Areas of Chemistry, and Equipment

Which is a qualitative measurement? Recall a qualitative measurement would not have a unit of measurement typically.

• color

• time

• mass

• length

Which is a quantitative measurement? When using a tool of measurement, it often requires a scale reading and a unit of measurement.

• hardness

• color

• taste

• temperature

Which is the variable that is observed as a result, and it potentially changes during the experiment?

• independent variable

• control

• dependent variable

• conclusion

Which is the variable that the researcher manipulates, or changes, and there should only be one of?

• independent variable

• control

• dependent variable

• conclusion

Which of the following is qualitative data? It would not have a unit of measurement.

• odor (smell)

• temperature

• pressure

• volume

Which of the following is quantitative data?

• color

• shape

• odor (smell)

• volume

"Controlled variables," also known as a "constants," __________.

• change during an experiment

• never change from one lab group to another

• are affected by the dependent variable

• are not allowed to change during an experiment

The "control" or "control group" is a _________.

• variable that changes during an experiment

• standard intended for comparison to your results

• type of dependent variable

• type of independent variable that never changes

A hypothesis is a(n) __________.

• set of observations that is made always after chemistry research procedure already starts

• explanation supported by many experiments, often mathematical in chemistry

• explanation of observations of how a part of nature works, which can predict repeated behavior; it has a certain "If ..., then..., and when ..." form in chemistry

A chemical hypothesis should address:

• the independent variable and its magnitude

• the predicted and explained dependent variable(s) and their magnitude

• the submicroscopic unseen particle behavior

• the macroscopic evidence

• all the other answers are correct