Astronomy 1 ID: ______

Name: ______

Astronomy 1 Homework #2

Answer following questions from the textbook.

Ch4

3. Make a list of each main phase of the Moon(Skip other part of this question)?

5. What are the two ways that the tilt of Earth’s axis causes the summers in the United States to be warmer than the winters?

8. What is the phase of the Moon during a total solar eclipse? During a total lunar eclipse?

16. Why does the Moon create tidal bulges on both sides of Earth instead of only on the side of Earth closest to the Moon?

25. Where are you on Earth if you experience each of the following? (Refer to the discussion in Observing the Sky: The Birth of Astronomy as well as this chapter.)

A. The stars rise and set perpendicular to the horizon.

B. The stars circle the sky parallel to the horizon.

C. The celestial equator passes through the zenith.

D. In the course of a year, all stars are visible.

E. The Sun rises on March 21 and does not set until September 21 (ideally).

Ch5

1. What distinguishes one type of electromagnetic radiation from another? What are the main categories (or bands) of the electromagnetic spectrum?

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4. Where in an atom would you expect to find electrons? Protons? Neutrons??

6. Explain how the Doppler effect works for sound waves and give some familiar examples.

27. Explain why astronomers use the term “blueshifted” for objects moving toward us and “redshifted” for objects moving away from us.

36. Astronomers want to make maps of the sky showing sources of X-rays or gamma rays. Explain why those X-rays and gamma rays must be observed from above Earth’s atmosphere.

You do not have to write down the problems. This homework is due on 9/19.

Extra Activity.

Watch the following videos:

1.  Bill Nye, the Science Guy, Explains the Seasons: https://www.youtube.com/watch?v=KUU7IyfR34o. For kids, but college students can enjoy the bad jokes, too (4:45).

2.  Doppler Effect: http://www.esa.int/spaceinvideos/Videos/2014/07/Doppler_effect_-_classroom_demonstration_video_VP05. ESA video with Doppler ball demonstration and Doppler effect and satellites (4:48).