| Sun
clock
- science kids projects |
Time
taken - the initial preparation will take 10 mts, subsequently the
children will spend 5 mts every hour
Round
cake tin
2 feet stick
Markers (plastic numbers or stones)
| 1. |
Fill
the tin with moist sand or garden soil. |
| 2.
|
Press
a stick exactly into the center of the tin |
| 3. |
Move
the can into a sunny area. |
| 4. |
On
the hour every hour place a marker at the top of the shadow
made by the stick. |
| 5. |
The
sun clock is ready. |
Remember
not to change the location of the clock or all the markings will
have to be done again.
2 plastic jar
Thick paper
Cello tape
Glue
Sand or dry salt
Stop watch or watch
| 1. |
Make
two funnels out of the thick paper. These should just fit inside
the jars. |
| 2. |
Glue
the lids together, back to back. |
| 3. |
Make
a hole in the center of the lids. Don't make it too big or the
sand will flow out too fast. |
| 4. |
Glue
the paper funnels to the jar lids so that their narrow ends
surround the hole. |
| 5. |
Fill
sand in one jar. |
| 6. |
Attach
both the jar to their lids, keeping the sand filled jar at the
bottom. |
| 7. |
Now
invert the jars. |
| 8. |
Use
a stopwatch to time a minute from the moment the sand start
flowing out. |
| 9.
|
The
moment one minute is up, turn the hourglass onto its side. The
sand will stop flowing. |
| 10. |
The
sand in the lower jar is the amount you need. |
| 11. |
Remove
the left one sand in other jar. |
The
hour glass is ready. It can be used as a timer in games played by
the children.
Salt
is not useful in an hourglass in humid weather.
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