1. What would be the probable effect of the conditions 11,500 years ago, on the nothern continental ice sheets? Why?
2. How does the duration of insolation, or length of daylight, vary from December 21 to June 21 for a location at 40 degrees North Latitude?
For a Location of 40 degrees South Latitude during the same period?
3. Record the number of hours of night on March 21 for the following locations:
0 degrees Latitude ______
40 degrees North Latitude _______
90 degrees South Latitude _________
5. What is meant by %26#039;%26#039;the land of midnight sun%26#039;%26#039;? Where, when, and why could this situation exist?
6. Can you think of other models that can be used to show the interrelationships between Earth motions, seasons, and climate changes? One such model you will find interesting is the analemma. Find an analemma and write a brief description of how it shows these interrelationships.
Please Help, and thanks so much!|||lots of possible answers
before 1650 AD people thought the earth was the center of the universe and every thing, sun moon stars went around us
this made sense from our observations
People did know the earth was round
finally we understand the earth goes around the sun once a year and spins on its own axis once a day
the combined motions give us day and night and the seasons
day-night is easy to picture
the earth spinning as it goes around the sun is a little trickier.
look at a world globe. notice that it is mounted at a tilt, not straight up and down
the spin axis which is the direction of north to south pole. (not a real rod through the earth, just the direction around which the earth spins is tipped about 27 degrees away from the path of the earth orbit
the direction of north south which points to the stars never changes as the earth goes around the sun
As a result in the summer the northern hemisphere , america, it tilted toward the sun and the sun is higher in the sky and the days are warmer. In the winter the opposite happens
Since Australia is in the southern hemisphere , their winter is our summer
get your friends, a world globe a dark room and a flashlight
shine the light (sun) on the globe and spin it slowly, Watch daylight cross the continent
next move the light (or globe) so the tilt is away from the light compare the light and dark places.
this is hard to visualize and imagine but will help understand the seasons and would make a good school project
