Turn in summative assessment reports on mixing ethanol and water.
If you do not have the report ready, immediately email your parents and me in the same message. Explain that you have not completed the assessment project by the due date. Predict when it will be complete and submitted. Acknowledge that you understand that it is a major assignment.
While you are waiting and whenever we have time during class, read the rest of the blog post, explore the links and ideas, work on your digital science notebook, and continue to prepare your document/presentation for the student-parent-teacher conference.
When everyone has had a chance to submit, we will go outside for some observations. Have your compass app and your angle measuring app downloaded and ready to use. Have an aerial photo / map of the school and neighborhood bookmarked. Save an image. Do the same for your residence and neighborhood. Orient your mental map of both the school and your home/neighborhood–north, south, east, west.
Below are some important terms and ideas. Today’s DSN entry should go in the astronomy folder. In addition you should start a “Sky sightings” list (document or folder) in the astronomy folder of your DSN. For each sighting include your location, the time, the date, the direction you are looking (bearing), the angle of elevation, appearance / phase, and other observations. The goal of keeping this sky-watching journal is to become familiar with local astronomical phenomena to the point you will be able to develop explanations and will be able to appreciate the history of astronomical observations and explanations up to our time.
- Plate and gnomon sundial
- Universal sundial
- Angle of elevation
- Altitude (angle)
- Equinox (Autumnal / Vernal)
- Notice the date https://www.timeanddate.com/calendar/autumnal-equinox.html
- Celestial longitude
- Terrestrial longitude
- Great circle
- Apparent (motion)
- What do you know about shadows?
- What do you know about perspective?
- What do you know about triangles?
- What do you know about parallax?
- What do you know about indirect measurement?
- History of science–How can the use of astronomical words from Arabic be explained?
Browse the following websites:
A useful video
18 September at sunset–notice the direction the sun is setting:
Download a free compass app. Find out how it works. Use it with a map to find out how the school is oriented. Do the same with your home. Does the IPAD compass show magnetic north or true north or both. What is the difference? Also download an angle measuring device–sometimes called a clinometer. Figure out how it works and become competent in using it. Practice.
Begin watching the sun. Where along the horizon does it rise? What time? What time is it highest in the sky? When it is highest in the sky, which way does the shadow point? What happens to the length of the shadow from day to day? Watch along the horizon which way the sun sets? In Delhi, when is the sun directly over your head (so that you would have no shadow)?
The moon is now in the “waning crescent” phase. By October 6 it will be full. Begin watching for the moon. Look for it in the sky when you come to school. Look for it in the afternoon and evening. Look for it during the day. Look for it during the night. When you see it, note the time, the date, the phase, the orientation in the sky, the direction along the horizon you must face to see the moon (we can call this bearing), and the angle you must tilt your gaze upward to see the moon (we can call this angle of elevation).
Put your observations in a “Sky sightings” in the astronomy folder of your DSN. For each sighting include your location, the time, the date, the direction you are looking (bearing), the angle of elevation, appearance / phase, and other observations. The goal of keeping this sky-watching journal is to become familiar with local astronomical phenomena to the point you will be able to develop explanations and will be able to appreciate the history of astronomical observations and explanations up to our time.
When do you think the picture above was taken? Explain your reasoning.
Picture taken at sunset on 2 September, 2017. Notice the sunspots. See this http://spaceweathergallery.com/indiv_upload.php?upload_id=138692