Across
- 1. a planet's motion around the sun; Earth makes one full revolution around the sun once about every 365 days.
- 4. a tide whose difference in high and low water levels is at its minimum due to the fact that the sun, Earth, and moon form a right angle; neap tides occur every 14 to 15 days during the first and last quarters of the moon cycle.
- 5. the pattern of the changing phases of the moon that repeats about once every 29 or 30 days.
- 8. a predictable change in ocean water level due to a change in gravitational pull on Earth's ocean water as the sun, moon, and Earth change positions relative to one another in space.
Down
- 2. an ellipse-shaped path that an object travels along as it circles another object in space due to gravity.
- 3. a tide whose difference in high and low water levels is at its maximum due to the fact that the sun, Earth, and moon form a line; spring tides occur every 14 to 15 days during the new moon and full moon.
- 6. the spinning motion of a planet; Earth makes one full rotation every 24 hours.
- 7. an imaginary line drawn from Earth's North Pole to its South Pole about which Earth rotates.