Reference no: EM133352749

Make a list of each main phase of the Moon, describing roughly when the Moon rises and sets for each phase. During which phase can you see the Moon in the middle of the morning? In the middle of the afternoon?

1. What are advantages and disadvantages of apparent solar time? How is the situation improved by introducing mean solar time and standard time?

2. 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?

3. Why is it difficult to construct a practical calendar based on the Moon's cycle of phases?

4. Explain why there are two high tides and two low tides each day. Strictly speaking, should the period during which there are two high tides be 24 hours? If not, what should the interval be?

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

6. On a globe or world map, find the nearest marked latitude line to your location. Is this an example of a great circle? Explain.

7. Explain three lines of evidence that indicate that the seasons in North America are not caused by the changing Earth-Sun distance as a result of Earth's elliptical orbit around the Sun.

8. What is the origin of the terms "a.m." and "p.m." in our timekeeping?

9. Explain the origin of the leap year. Why is it necessary?