Science Vocab

2. An invisible force that pulls objects toward each other.
3. A “invisible line” around which an object spins.
6. The greatest height reached as the water rises.
9. The Earth circling the sun.
10. The angle between the planet’s rotational axis and the orbit axis.
12. A tide just after a new or full moon, when there is the greatest difference between high and low water.
15. Any phase of the moon during the lunar cycle between the new moon and the full moon.
16. A period of moderate tides when the sun and moon are at right angles to each other.
17. As the Moon moves around Earth in its orbit, the light reflecting off the side of the Moon creates a sliver of shape.
18. Four different types of weather throughout the year.

1. The portion of the moon that we can see from Earth on any given night.
4. An object spinning on its axis and pace.
5. A certain phase of the moon, when it's bulging outward but isn't full.
7. The lowest level is reached as the water falls.
8. Half of a celestial sphere separated into halves; by the horizon.
11. The alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.
13. The representation of the moon's journey around the Earth.
14. The act of showing a slow decrease in the portion of illuminated surface, between a full moon and a new moon.