Final answer:
The steps in an experimental investigation that are not part of descriptive or comparative investigations are making a hypothesis, testing the hypothesis by experiment, and rejecting the old hypothesis and making a new one.
Step-by-step explanation:
The steps in an experimental investigation that are not part of descriptive or comparative investigations are:
- Making a hypothesis: A hypothesis is a tentative explanation for an observation or set of observations.
- Testing a hypothesis by experiment: Scientists conduct experiments to test the validity of their hypothesis.
- Rejecting the old hypothesis and making a new one: If the results of the experiment do not support the initial hypothesis, scientists may reject it and formulate a new hypothesis.