NEED HELP!! "Compare the first and third quarter of the moon cycle as seen from the Northern Hemisphere. You must discuss the relative positions of the sun, moon, and earth in your response"

The Third Quarter Moon is when the opposite half of the Moon is illuminated compared to the First Quarter. Which half you see lit up depends on where you are on Earth. Only 50% of the Moon is illuminated during its third quarter phase.

prndulum needs thread, weight clock to time swings