End of Unit 5 Assignment
assignment consists of four parts. The first is a review with a couple
of practice questions linked directly to their answers. The second
is a short quiz that you take using Blackboard. It will be instantly
scored for you by Blackboard; you only get once chance to take it, however,
so be sure you are ready! The third part is an essay question. The
question appears below; when you are ready to answer it, log on to
Blackboard and submit your essay. Finally, for each unit, you should
log on to Blackboard and contribute a question, an answer, or a comment
to one of the posted topics. If you would like to introduce a new topic
instead of contributing to an existing thread, please send your topic
idea to your instructor. If you find the material in this unit challenging,
you might want to start with the "discussion" part of the
assignment in order to get some help with some of the ideas.
Click here for a printable
(.pdf) version of this assignment. To view .pdf files, you will need
the free software Adobe Acrobat - click
here to download Adobe Acrobat.
Brief summary of Unit Five:
In this unit we have gone through some of the astronomical
factors that influence the seasons where you live, emphasizing mainly
of the sun's declination at different latitudes. We have then also
gone on to discuss some of the other factors that influence your climate
- most importantly, heat storage in water and soil, and transport of
heat by water and air currents.
Before you go to the quiz, see how you do on these two questions.
If you have trouble, you might want to review the unit, send a question
to the discussion group, or seek help from the instructor.
Practice Question One
On which of the following dates and viewed from which
of the following locations will the sun rise due east? Rise farthest
north along the
horizon? Rise farthest south along the horizon? Never rise at all?
Dates: March 21 (or, the vernal equinox); June 21 (or,
the summer solstice); September 21 (or, the autumnal equinox); December
Locations: Latitude 70S, 50S, 20S, 0, 30N, 60N, 80N.
is a meridian diagram. What is the observer's latitude? Is the declination
of the sun on this date positive or negative? What is the altitude
of the sun on the meridian at this latitude when its declination is
In which of these locations might you observe a
vertical post casting no shadow at noon on a sunny day? Honolulu, Winnipeg,
Paris, Rome, Cape Town?
When you are ready, Blackboardand
take Quiz Five.
You will get instant feedback on your score on Quiz Five
(and your instructor will also be informed of your score). If your
score is OK,
you may proceed directly to the Essay Question Five on BLackboard. Otherwise,
you might want to look at what you missed, ask your instructor about
questions you missed, or review relevant parts of the unit.
You have a yard with 40' tall trees located 40' from your house to the South of the house. Your latitude is 45 degrees N. How much of the year will your garden be shaded all the way to the house at noon? What will be the first day this happens? The last day? Explain your logic!
Here is a picture to
illustrate this situation:
When you are ready to answer this question,
go to Blackboard
to write your answer.
Alternative to the Essay Question
Apply the same logic as is presented in the essay question
to a real situation - for example, to figure out when one building on campus will
shade another, or whether a tree will shade your house at noon. After
applying that logic, check your answer by direct observation. You may
submit your answer via WebCT in place of the essay, or email us
Don't forget to contribute to the discussion
one of the topics in this unit!