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NAME___________________________________ PERIOD________ DATE ______
PHASES OF THE MOON Oreo Cookie Lab
Procedure:
Each pair of students will receive two Oreo cookies
b) Separate your cookies carefully, so one ½ has all the frosting, and the other ½ no frosting.
With both cookies, one is for new moon to full moon and one is for new moon to full moon.
Do not make a mistake. There will be NO replacement cookies! See figure 1:
c) Use your toothpick to scrape off the frosting from the first cookie making the shape for the moon that follows a new / full moon (teacher explain)
D) draw what the cookie with frosting looks like for this phase onto diagram b
E) scrape off a little more frosting so your cookie looks like the 2nd phase after the new/full moon. Then follow step D again
F) Continue step C-E till you reach the full moon if started with new moon and/or the new moon if you started with a full moon
Once finished clean up area, throw away cookies, toothpicks and then answer questions.

1. On Diagram B, label each of the phases in order from position 1 to the final phase on Diagram A.
2. Describe the process that causes the moon to appear as these different phases to Earthlings.
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3. How long is one cycle of phases? ____________________________________________________
4. What is the average time (in days) between phases? ____________________________________

5. Describe the process that causes the moon to appear as these different phases.
6. How does it take the moon to go through one full cycle of phases (use your notes as needed)?
7. Why does the same side of the Moon always face Earth?
8. Why don’t solar and lunar eclipses happen every single month?
9. Using Diagram B as a reference, complete the Diagram C , remember to read the directions carefully.

Diagram C: After you complete the lab, draw each phase of the moon. Position 1 would be the new moon, ending with position 8 as the waning crescent. Draw the SUN.
Which direction would the Sun’s light be going in this model?

Position 1

Position 2

Position 8

Position 3

Position 7

Position 4

Position 6

Position 5