1. Is a pound of butter on mars the same as a pound of butter on earth? Explain.

2. You can show that the sun gravitationally attracts the moon with a force which is more than twice the force of the earth on the moon. Why does the sun not take the moon away from the earth?

3. There is no gravity in space. True or false?

4. Assuming that the earth and sun are the most important gravitational forces on you, when do you weigh most?

A. Sunrise
B. Noon
C. Sunset
D. Midnight
E. All same