1. The Moon

2. maria: smooth, dark areas of the moon- reflect little light
Lunar Surface
maria: smooth, dark areas of the moon- reflect little light
maria are plains of dark solidified lava

4. craters: bowl-shaped depressions on the moon
lunar craters are formed from impacts of debris

5. regolith: layer of dust and rock that covers the moon’s surface

6. Interior of the Moon

7. Why does the same side of the moon always face us?
Because the moon rotates and revolves at the same speed (27 1/3)

8. Eclipses
when one planetary body passes through the shadow of another

9. solar eclipse: when the moon is directly between the Earth and the sun

11. lunar eclipse: when the Earth is directly between the moon and the sun

13. Eclipses don’t occur every month because the moon’s orbit is tilted with respect to the Earth’s orbit

15. Moon Phases
phases: various shapes of the moon lighted by reflected sunlight

16. waxing: when the size of the visible portion of the moon is increasing
waning: when the size of the visible portion of the moon is decreasing

17. new moon: no lighted area of the moon is visible from the Earth
full moon: entire half of the side of the moon facing Earth is lit

18. crescent: less than half of the side facing the Earth is lit
gibbous: more than half of the side facing the Earth is lit

19. New moon
Waxing crescent
1st quarter
Waxing gibbous

20. Full moon
Waning gibbous
Waning crescent
3rd quarter

22. Tides tides: daily changes in the level of the oceans
-caused by the moon’s gravitational pull
-tide changes every 6 hours

23. Tide animation: The spinning Earth within a slightly elliptical ocean results in the rising and falling of the ocean surface, with respect to the land, over the course of a day. For each 24 hour period there are two high tides and two low tides as the Earth rotates through each of the two bulges of the the ocean surface

24. spring tide: tide with maximum daily tidal range that occurs during new and full moons

25. neap tides: tides with minimum daily tidal range that occurs during 1st and 3rd quarter moons