Comparative studies of objects in a group help us learn more about those objects than we could learn by studying each object individually. With this goal in mind, watch this video, and select all of the following choices that describe your observations of patterns. As you do so, think about the implications of how the Solar System may have formed. Choose one or more:
A. The planets closest to the Sun are much smaller than the planets that are farther away.
B. The size of all planets increases with distance from the Sun.
C. All planets orbit the Sun in the same direction.
D. Planets orbit the Sun in random directions.
E. Planets are evenly distributed in distance from the Sun.
F. All planets orbit the Sun in a spherical distribution.
G. All planets orbit the Sun in a roughly flat plane.
H. The outer planets (those farthest from the Sun) are spaced farther apart from one another than the inner planets are spaced.

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

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)

The discovery of the electron as a subatomic particle was a result of