1) What is the difference between a measurement and an observation?
Question options:

Measurements are made with tools; observations are not.
Observations are biased, while measurements are always unbiased.
Measurements are compared to a standard; observations are not.
Observations are only indirect ways of gathering data.



2) Understanding how your heart works can BEST be done by which of the following?
Question options:

measuring your pulse
making a model that simulates the heart’s functions
observing how you respond to exercise
hypothesizing about how the heart works