What caused the earth to form?
How long does it take the moon to have one day?
Why are the moon and earth locked in a cycle?
Why are the tides a good thing?
What is happening each year to the moon-Earth system?
You will need to complete the activity found here
Possible links of help.
http://astro.unl.edu/naap/lps/animations/lps.html
http://www.astro.wisc.edu/~dolan/java/MoonPhase.html
http://csep10.phys.utk.edu/astr161/lect/time/phases.jpg
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