1. Formulate a Question: The scientist formulates a question to be answered. The question must have a concrete answer that can be obtained by making additional observations or by performing an experiment.

2. Create a Hypothesis

This is a possible answer to the question: an explanation, capable of being tested and disproven, for the question first posed.

3. Prediction

A scientist devises a plan to study and gather data, making a prediction about the outcome of the investigation.

4. Investigation and Observation

A scientist performs the investigation and is observant of all that occurs. Data is gathered and observations are made.

5. Summary

A good scientist summarizes his or her entire experiment, from the question, to the hypothesis and prediction, to the observations, comparing the predicted outcome to the actual outcome, and deciding about the validity of the original hypothesis. A good scientist will also consider new questions that may have arisen during the experiment.

19. explain why a magnet from your refrigerator could not be used to lift something as heavy as a car. (chapter 7 – pages 202-203) 20. can a magnet ever have a single pole? explain your answer. (chapter 7 – page 208) 21. what happens to the wavelength of a wave if the frequency is increased? (chapter 9 – pages 280-281) 22. an ocean wave has a wavelength of 10 m and a frequency of 4.0 hz. what is the velocity of the wave? show the appropriate equation from your book and show your work with units. (chapter 9 – page 282) 23. as you sit outside, the sound of a siren becomes lower in pitch. is the emergency vehicle moving away from or towards you? explain how you know. (chapter 10 – page 315-316) 24. why are two astronauts in space unable to hear one another? (chapter 10 – page 307) 25. explain in at least 3 sentences how electromagnetic waves form. (chapter 11 – page 338-339) 26. using the chart on page 345 in your textbook, what are the three types of electromagnetic wave with wavelengths shorter than those of visible light. give an example of each. (chapter 11 – pages 345-351) 27. explain why a leaf usually appears to be green, but a rose typically appears red. (chapter 12 – page 373) 28. what is the difference in light that is refracted compared to light that is reflected? think in terms of speed of light as well as what happens to light waves when they interact with a medium. (chapter 12 – pages 369-370) 29. how are concave and convex lenses different? (chapter 13 – page 408-410) 30. what type of mirror is used in rearview mirrors in cars? why is it important that these mirrors have the warning, “objects in mirror are closer than they appear.”? (chapter 13 – page 405)

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

What causes the formation of ocean currents?