# Sun and Winter Solstice

Use the angle measurements on the left side of the dome to get the maximum angle of the sun. You donβt have to be exact, but you should be within 5Β° of the correct answer. Estimate the length of the day to the nearest hour. Answer: Latitude(in degrees) | Time of Year | Rise Position Choose one: – exactly east- north of east- south of east | Set Position Choose one: – exactly west- north of west- south of west | Maximum Angle of the Sun(in degrees) | Length of Day(in hours) | 0 | winter solstice | | | | | | spring equinox | | | | | 0 | summer solstice | | | | | 0 | fall equinox | | | | | 40 | winter solstice | | | | | 40 | spring equinox | | | | | 40 | summer solstice | | | | | 40 | fall equinox | | | | | (6 points) Score |

Show how the length of day changes with latitude by plotting the following points. Use the table below as a graph and place an X in the box where you want to plot a data point. For example, if you find that a day is 10 hours long at 30Β° N latitude, represent this data with an X in the box where 10 hours meets 30 degrees. (You may use a graphing program like Excel if you prefer.

Based on your observations, describe how the length of day is affected by latitude in the summer and in the winter. In your explanation, explain which latitudes are affected most by the seasonal change and which latitudes are affected least. Answer: (2 points) Score | Measure the length of the day on the spring and fall equinoxes for latitudes 0, 15, 30, 45, 60, 75, and 90. With the exception of the North and South poles, (a) What can you say about the length of day for the fall and spring equinoxes? (b) What happens above 66? Β° (the Arctic Circle) on the equinoxes? (c) Where does the sun rise and set on the equinoxes. Answer: Your Score | ___ of 20 |

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