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