10/25/2016 Tuesday

Science Log Q2 week 2 Tuesday, October 25: The sun rises about the same time throughout the month, but the moon rises at different times. What does this suggest to you?

8. Moonrise Think about what you know about the sunrise and moonrise for a minute

8. Moonrise Think about what you know about the sunrise and moonrise for a minute How are sunrise and moonrise the same, and how are they different?

8. Moonrise How are sunrise and moonrise the same, and how are they different? Both rise in the east and set in the west. The time at which the Sun rises changes very little day to day; the time of moonrise changes significantly day to day.

8. Moonrise What causes the rising and apparent motion of the Sun and Moon across the sky?

8. Moonrise What causes the rising and apparent motion of the Sun and Moon across the sky? Rotation of Earth

Is there any pattern to the time at which the Moon rises?

9. Analyze moonrise data Open you Science books to “Moonrise/Sunrise Data” in the images section of the book and study the table. Discuss in your groups what you discover

9. Analyze moonrise data Calculate how much later each day the Moon rises. What is the average number of minutes that moonrise is delayed day to day?

9. Analyze moonrise data Calculate how much later each day the Moon rises. What is the average number of minutes that moonrise is delayed day to day? The Moon falls behind by an average of about 51 minutes per day.

10. Moon revolving around Earth Compare the sunrise times to the moonrise time in the “Moonrise/Sunrise Data” table

10. Moon revolving around Earth Compare the sunrise times to the moonrise time in the “Moonrise/Sunrise Data” table The Sun rises about the same time throughout the month, but the Moon rises at all different times of the day and night as the month progresses.

10. Moon revolving around Earth Compare the sunrise times to the moonrise time in the “Moonrise/Sunrise Data” table The Sun rises about the same time throughout the month, but the Moon rises at all different times of the day and night as the month progresses. What does this suggest to you? Discuss

10. Moon revolving around Earth What does this suggest to you? The Sun rises about the same time every morning in any given month because it is essentially stationary. Its appearance the east at sunrise is caused by the rotation of Earth. The Moon does not rise at the same time each day of the month, so it must not be stationary. The Moon is moving---revolving around Earth in its almost—circular orbit.

11. Moon orbit Determine which way the Moon is revolving around Earth.

12. Sun/Moon models The polystyrene sphere is the Moon and the Sun Your head is the Earth, your eyes will be an observer on Earth.

13. Moon-phase challenge You challenge is to use the Moon models to observe the progression of Moon phases from new Moon to new Moon. This modeling will help you to reflect on your quick writes you completed earlier. What causes Moon phases?

14. The procedure The activity will be easier if the Moon has a handle. You will use a 5 cm piece of masking tape to build up one end of the straw so that it will fit snugly into the hole in the ball.

15. Moon phases When the “Moons are ready, place the “Sun” centrally in the room. Position yourselves around the Sun, maintaining as much elbow room between each of you as possible.

16. Discoveries Report your observations. Hold the Moon balls about 30 cm from your faces.

16. Discoveries Which way did you turn in order to simulate the revolution of the Moon around Earth? Where did you position the Moon model to observe the new Moon? The full Moon? Where did you position the Moon model to show the first-quarter phase? How can you simulate the rising and setting of the Moon?

16. Discoveries How can you simulate the rising and setting of the Moon? Hold the Moon in one position and turn your head from side to side, all the way right and to all the way left (counterclockwise), simulating the rotation of Earth, which is responsible for moonrise and moonset.

17. Change point of view Up to this point, our heads have represented Earth, and one eye has been you. Your point of view has been that of an observer in the action. Now, you will get your globe and Moon model and work with your group to explore phases of the Moon from the point of view of an observer outside the action.

18. Scientific practices Everything rotates or revolves counterclockwise (north-polar view). The visible portion of the half-illuminated Moon ball accounts for the phases. Position the models to demonstrate the four primary phases; new, first quarter, full, and third quarter.

19. Challenges In your groups, demonstrate the relationship among Earth, the Moon, and the Sun during the four prime phases of the Moon: new Moon, first quarter, full Moon, and third quarter. Use the rotation of Earth and the revolution of the Moon to demonstrate what time of day (or night) the Moon rises at each of its prime phases. Figure out how far the Moon travels around Earth during one full day.

20. New model Form a circle around the ball, do not block the sun Your head is the model Earth Rotate on your axes to observe sunrise and moonrise. Keep one eye closed and turn slowly counterclockwise, concentrating on observing when each body rises, and how close together they rise. It is the rotation of Earth that produces the appearance of a sun and a Moon rising.

21. Lunar Eclipse The orbit of the Moon around Earth is tipped on a little bit of an angle. In reality, since the Moon is so far from Earth, the Moon and Earth rarely line up so their shadows fall on each other. When the Moon is in the full-Moon position, occasionally the shadow of Earth does fall on the Moon, though this is infrequent. This produces what we call a lunar eclipse.

Make sure you have the proper spacing (30 Earth diameters, or 360 cm 21. Lunar Eclipse Use your Earth globes and your Moon ball to demonstrate an eclipse of the Moon. Make sure you have the proper spacing (30 Earth diameters, or 360 cm We can use a piece of string to get the correct distance.

22. Solar eclipse We just saw Earth’s shadow fall on the Moon. Sometimes, when the Moon is in the new-Moon position, it will be perfectly aligned to cast its shadow on Earth, though this is also infrequent. This is called a solar eclipse because from Earth, the Sun is blocked. Use your Earth globes and your Moon to demonstrate an eclipse of the Sun. Remember your spacing.

23. Clean up Return you globes to the back and leave your Moon ball on the stick and bring it up front.

25. Vocabulary 5 (Look in purple book) put on page 59 and index Crescent: First Quarter: Full Moon: Gibbous: Lunar eclipse: 6. New Moon: 7. Phase: 8. Solar Eclipse: 9. Third quarter: 10. Waning: 11. Waxing: