Unit 2 Vocabulary

3. A pattern of temperature and weather trends over a period of months, caused by Earth’s tilt and revolution around the sun.
4. The lighter part of a shadow, where the light source is only partially blocked.
5. The regular rise and fall of ocean water levels, caused mainly by the moon’s gravitational pull.
7. The time it takes Earth to complete one revolution around the sun.
8. An event where one object in space casts a shadow on another.
9. The time it takes a planet to complete one full rotation on its axis.
10. Tide A tide with the greatest tidal range, occurring when the Earth, moon, and sun are in a straight line (new moon and full moon).
11. The motion of one body traveling around another body in space. Earth’s revolution around the sun takes about 365¼ days.
12. Range The difference in height between a high tide and the next low tide.
13. The time of year when the daylight hours are at their longest or shortest; occurs twice a year (June and December).
14. Tide A tide with the smallest tidal range, occurring when the Earth, moon, and sun form a right angle (first and third quarter moons).

1. The darkest part of a shadow, where the light source is completely blocked.
2. Phases The different appearances of the moon as seen from Earth, caused by the changing positions of the moon, Earth, and the sun.
3. A body that orbits a planet or other larger body; can be natural (like the moon) or artificial.
6. The force of attraction between objects that have mass.
8. The time of year when daylight and nighttime hours are approximately equal everywhere on Earth; occurs twice a year (March and September).
11. The spinning of a planet or other body on its axis. Earth’s rotation takes about 24 hours and causes day and night.