ch 7 -moon (2)
TRANSCRIPT
1. Pock marked with craters and maria(mar’-ee-a for plural,) or mare (mar’-eyh,)
which are the smooth places.
Gravity 1/6 that of the earth: 9.8/6 = 1.7 m/s2. That is why no water or atmosphere will stay there.
We always see the same side of the moon because it rotates on its axis at the same rate it revolves around the earth.
Try the dime/quarter experiment.
2. Capture: The moon was formed in another part of the solar system and captured by the earth’s gravity.
Condensation: The moon was formed near to and simultaneously with the earth in the early solar system.
Mars size celestial object collided with the Earth. This is well tested withevidence. Rocks from themoon have been found on the
Artic continent. They have the same composition as that of the earth.
Solid Iron inner core.
Semi-solid outer core.
Solid mantle.
Crust is thicker on the side facing awayfrom the earth.
http://www.esrf.eu/news/general/lunar-
volcanism/index_html
The Moon has quakes:
These are caused by the gravitational pull of
the Earth. Lunar astronauts used
seismographs on their visits to the Moon, and
found that small moonquakes occurred several
kilometres beneath the surface, causing
ruptures and cracks. Scientists think the Moon
has a molten core, just like Earth.
The Moon has only been walked on by 12
people; all American males:
The first man to set foot on the Moon in 1969
was Neil Armstrong on the Apollo 11 mission,
while the last man to walk on the Moon in 1972
was Gene Cernan on the Apollo 17 mission.
Since then the Moon has only be visited by
unmanned vehicles.
The Moon is the fifth largest natural satellite
in the Solar System:
At 3,475 km in diameter, the Moon is much
smaller than the major moons of Jupiter and
Saturn. Earth is about 80 times the volume
than the Moon, but both are about the same
age. A prevailing theory is that the Moon was
once part of the Earth, and was formed from a
chunk that broke away due to a huge object
colliding with Earth when it was relatively
young.