Week 5
lunar cycle
the 28 day period in which the moon’s orbit around the Earth causes it to reflect the sun in different phases
crater
a bowl-shaped structure at the top of a volcano or on a planet or moon
gravity
the force that pulls objects toward each other
tilt
to lean, tip, or slant to one side
axis
an imaginary line that passes from the North Pole to the South Pole through
Earth’s center
full moon
the phase of the moon when the side turned toward the earth is entirely lit
half moon
the phase of the moon when one half of the face turned toward the Earth is lit- can be either side depending on whether it is waxing or waning
quarter moon
the phase of the moon when one quarter (one- fourth) of the face turned toward the
Earth is lit
new moon
the phase of the moon when the side turned toward the earth is entirely dark
rotation
the spinning of a planet or moon on its axis
revolution
one complete trip of a planet around the sun
orbit
the path that one object in space takes around another object in space
waxing
The moon at any time after new moon and before full moon, so called because its
illuminated area is increasing
waning
The moon at any time after full moon and before new moon, so called because its illuminated area
is decreasing.
Slide 2: http://paganinstitute.org/images/Astronomy/lunar_orbit&phases.jpg
Slide 3: http://laps.fri.uni-lj.si/~duke/HPpictures/crater.jpg
Slide 4: http://www.adlerplanetarium.org/education/resources/gravity/img/gravity.jpg
Slide 5: http://www.2012-online.net/images/AxialTilt_1.jpg
Slide 6: http://www.chanceandchoice.com/ChanceandChoice/earthinclined.jpg
Slide 7: http://www.cs.princeton.edu/~jhalderm/pics/pu0001/m/full_moon.jpg
Slide 8: http://www.northrup.org/Photos/moon/low/half-moon.jpg
Slide 9: http://quartermoonbows.com/Photos/trimquartermoon.JPG
Slide 10: http://www.siennasoft.com/stargazer/images/1557OldMoon-NewMoon.jpg
Slide 11: http://www.hort.purdue.edu/newcrop/tropical/lecture_02/02m.jpg
Slide 12: http://www.teslasociety.com/pictures/solar10.jpg
Slide 13: http://cse.ssl.berkeley.edu/Segwayed/lessons/cometstale/images/orbit_med.gif
Slide 14: http://www.globalsecurity.org/military/ops/images/Moon_waxcres.gif
Slide 15: http://www.globalsecurity.org/military/ops/images/Moon_wancres.gif