1. Luna, The Moon Ch 21.4

2. The Moon Except for the Sun, the Moon affects us more than any other celestial body…tides & eclipses. Except for the Sun, the Moon affects us more than any other celestial body…tides & eclipses.

3. A few facts: Diameter: 3476 km Diameter: 3476 km Density: 3340 kg/m 3 Density: 3340 kg/m 3 Sidereal month: 27.32 days (one orbit about the Earth) Sidereal month: 27.32 days (one orbit about the Earth) Rotates on its axis at the same rate as it orbits the Earth. Rotates on its axis at the same rate as it orbits the Earth. Avg Distance from Earth: 384,400 km (measured by lasers to reflectors on Moon) Avg Distance from Earth: 384,400 km (measured by lasers to reflectors on Moon)

4. Phases of the Moon http://www.enchantedlearning.com/subject s/astronomy/ http://www.enchantedlearning.com/subject s/astronomy/ http://www.enchantedlearning.com/subject s/astronomy/ http://www.enchantedlearning.com/subject s/astronomy/ http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2503/es 2503page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2503/es 2503page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2503/es 2503page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2503/es 2503page01.cfm Complete the phases of the moon diagram Complete the phases of the moon diagram

5. Answers

6. Lunar Eclipses Penumbra = shadow within which sunlight is partially blocked Penumbra = shadow within which sunlight is partially blocked Umbra = shadow within which sunlight is completely blocked (Total eclipses) Umbra = shadow within which sunlight is completely blocked (Total eclipses) http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2504/es 2504page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2504/es 2504page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2504/es 2504page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2504/es 2504page01.cfm

7. Lunar Eclipses http://www.enchantedlearning.com/subjects/ astronomy/moon/Lunareclipse.shtml http://www.enchantedlearning.com/subjects/ astronomy/moon/Lunareclipse.shtml http://www.mreclipse.com/Special/LEprimer.htm l Write a description of a lunar eclipse and label the diagram.

8. Lunar Eclipse

9. Lunar Eclipse Answers

10. Solar Eclipses Umbral shadow of the moon is only about 150 km wide where it reaches the earth Umbral shadow of the moon is only about 150 km wide where it reaches the earth http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2505/es 2505page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2505/es 2505page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2505/es 2505page01.cfm http://www.classzone.com/books/earth_sci ence/terc/content/visualizations/es2505/es 2505page01.cfm

11. Solar Eclipse http://www.mreclipse.com/Special/SEprimer.html http://www.enchantedlearning.com/subjects/astronomy/sun/solareclipses.shtml Write a description of a solar eclipse and label the diagram.

12. Solar Eclipse Answers

13. Lunar Surface Highlands = light colored rock Highlands = light colored rock Maria = dark areas, smooth, dark solid lava flows flooded the basins Maria = dark areas, smooth, dark solid lava flows flooded the basins Rilles = deep channels perhaps caused by volcanic activity Rilles = deep channels perhaps caused by volcanic activity Craters = depressions from meteoroid impacts Craters = depressions from meteoroid impacts Rays = displaced material Rays = displaced material

14. Interior Seismologists look at seismographs and see weak quakes Seismologists look at seismographs and see weak quakes 4 seismometers were placed during Apollo 4 seismometers were placed during Apollolandings Crust is thin on the side towards Earth Crust is thin on the side towards Earth Crust is thick on back side Crust is thick on back side Perhaps has a small, partially molten metallic core Perhaps has a small, partially molten metallic core Little of no volcanic activity has taken place in 3 billion years Little of no volcanic activity has taken place in 3 billion years

15. Chemical composition Similar to the silicate rocks of the Earth’s crust Similar to the silicate rocks of the Earth’s crust Water is nearly absent Water is nearly absent

16. Atmosphere The moon has a minimal atmosphere since gases escape almost immediately. The moon has a minimal atmosphere since gases escape almost immediately.

17. Other moons Mars Mars Asteroids caught by Mar’s gravity Asteroids caught by Mar’s gravity Jupiter Jupiter Io = volcanically active Io = volcanically active Saturn Saturn Frozen water with rocky material Frozen water with rocky material Uranus Uranus Ice, rock & heavily cratered Ice, rock & heavily cratered Neptune Neptune Triton revolves in retrograde orbit & geologically active Triton revolves in retrograde orbit & geologically active Pluto Pluto Charon Charon