Reviewing Key Concepts
1(a) what is a tide? What causes tides?
1(b) Explain why the moon causes a tidal bulge to form on the side of Earth closest to it.
1(c) The sun is much bigger than the moon. Why doesn’t the sun affect tides more than the moon
does?
2(a) Why do the heights of tides change during the course of a month?
2(b) Describe the positions of the sun, moon, and Earth during a spring tide and during a neap tide.
2(c) Imagine that you are the captain of a fishing boat. Why would it be helpful to consult a monthly
tide table?
3(a) How can tides be used to generate electricity?
3(b) Do you think that tidal power will ever be a major source of energy worldwide? Why or why not?