KIDPROJ Math Pen Pals

This Kidproj project ended in 1996.

A Question about Latitude and Length of Day

by: Delmar Students


               Hours of Daylight on March 20, 1995 EQUINOX

----------------------------------------------------------------------------

90 N

80 N

70 N                     ----Utsjoki----Finland---------------

60 N                      ---Helsinki----Finland--------------

50 N                        -----Dalmeny---Canada---------------

40 N                    -----Somerville----New Jersey--------

30 N                   -----Sde-Boker------Israel----------

20 N                      -------Brownsville---Texas-----------

10 N

Equator                 ----Guayaquil-----Ecuador-----------

10 S

20 S

30 S                      ---Lake-Macquarie-City--Australia----

40 S                      ----Christchurch----New---Zealand----

50 S                      ---Dunedin----New--Zealand-----------

60 S

70 S                      ^...sunrise                  sunset..^

80 S

90 S

      00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23



                                 Time of Day





   James and I took the sunrise and the sunset data from March 20,1995, and we

graphed it. Then we looked at Leslie's graph from December 21, sunrise sunset

data and we compared them. We noticed that latitude makes a difference in

December.  Some places had more daylight. In March the latitude did not seem

to make a difference.  Why not?



by:

Chrissy Kirk and James Sinthavong (age 11)



============================================================================



               Hours of Daylight on December 21 1994

----------------------------------------------------------------------------

90 N

80 N

70 N                                    -FI----

60 N                              ----Finland--------

50 N                           ----Canada---------------

40 N                        -------Illinois--USA--------

30 N                        -------Florida-USA------------

20 N                        -------Hawaii-USA-------------

10 N

Equator                ----------Fortaleza,--Brazil--------

10 S

20 S                   ---------Rio-De-Janerio,--Brazil-------

30 S                    ------Santiago,--Chile-------------------

40 S                   ^                                       ^

50 S                sunrise                                  sunset

60 S

70 S

80 S

90 S

      00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23



                                 Time of Day



by: Leslie Dyson

    Delmar Elementary

    age 11

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