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Ask for
your Parent's help.
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Cut one piece
of the heavy cardboard into a 12-inch square.
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Place the
compass at 6 inches, the midpoint of the 12-inch square. Draw a half
circle from one corner to the other corner of the square.
-
Draw a
triangle on the second piece of cardboard. Use the ruler to measure
12 inches up from one corner. Turn the cardboard 90 degrees. Measure
from the mark up 12 inches. Use the ruler to draw a line from one
mark to the other. You should see a triangle with two 12-inch sides
and one long side of just under 17 inches.
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Cut out the
cardboard triangle.
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Use the glue
and the masking tape to secure the 12-inch side of the triangle
across the middle of the half-circle. This will divide the
half-circle in directly in two.
-
Take the sun
clock outside on a sunny day. It is best to do this close to 12:00
P.M.
-
Use the
compass to point the cardboard triangle directly north. Look at the
watch and mark where the shadow falls on the cardboard exactly at
the hour mark.
-
Come back
every hour and mark where the shadow has fallen until the entire sun
dial is marked.
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Now you can
tell the time just by looking at the shadow on your sun clock.
