Space Academy

Sundials

Science; Earth and Space Systems
- construct a device that could have been used to tell time before mechanical clocks were invented
Language; Reading
- use conventions of written materials to help them understand and use the materials
- select appropriate reading strategies

  A Link to Learning web-based student learning activity     www.linktolearning.com

Read about sundials and how they work at;

http://www-spof.gsfc.nasa.gov/stargaze/Sundial.htm

Construct your own sundial using the instructions and the template provided at;

http://www-spof.gsfc.nasa.gov/stargaze/Sdial2.htm

Be prepared to explain to your teacher how the sundial works.

 

Based on what you have read and your experience with your own sundial, answer the following questions.

1. When doesn't a sundial work? __________________________________________________

2. Does your sundial match your watch time? __________

Why? ________________________________________________________________________

3. Why don't we use local solar time instead of time zones in our everyday lives? ________________

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4. Why didn't the ancient Egyptians use watches instead of sundials and obelisks?  ______________

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