Cycle of the moon, sun and earth
How long does it take for the earth to orbit around the sun?
Holidays that are in the torah and that are celebrated in the month of Tishrei?
Rosh Hashana, simchat torah, Shemini Atzeret
Why is it dark on one side of the earth and sunny on the other side?
Because the earth is orbiting around the sun and they share two different location, they will have daylight at two different times.
What mitzva do we do in the holiday if Succot?
Eat under the Sukkah
How many days does the moon take to make one revolution around the earth?
27 days
What are the months with no holidays?