Escape Velocity
the minimum speed an object must have to free itself from the
gravitational pull of a planet
Force
a push or pull of an object
Mass
the amount of matter in an object
Terminator
the line dividing the lighted side of the moon from the dark side
Why is the moon's shape nearly spherical?
because it rotates slower
what is the metric unit for measuring mass?
kilogram
what is the metric unit for measuring weight?
newtons
Ray
made of a lighter material that appears to have been blasted from
within the crater on the moon
Mare
a dark, flat, lowland region on the moon's surface
Rill
long, narrow, valleys on the moon's surface
what name is given to the round pits on the moon's surface?
craters
according to scripture, for what purpose did God create the moon?
for signs,
for seasons,
for days and years
Perigee
the moon's point of closest approach
Apogee
the moon's most distant point of orbit
New Moon
the phase when the moon is positioned in its orbit between the sun
and earth and is not visible because of the sun's glare
Waxing Crescent
occurs during the week following a new moon, when its illuminated
portion appears as a thin, gradually, thickening crescent
Cusps
a pointed end of a crescent moon
Earthshine
sunlight reflected from the dark side of the moon that was originally
reflected from the earth
First Quarter
the phase when the western half of the moon is lighted and the
eastern half is dark
Waxing Gibus
the phase as it increases between first quarter and full moon
Full Moon
the phase when the moons entire nearside is lighted
Harvest Moon
the full moon nearest the autumnal equinox
Hunters Moon
the next moon after the harvest moon
Waning Gibus
the decreasing phase following a full moon turning into a third quarter
Third Quarter
the phase where the eastern half is lighted and the west is dark
Waning Crescent
the decreasing phase during the last week of the lunar cycle
in what direction relative to the sun do the cusps always point?
away from the sun
Solar Eclipse
occurs only at new moon
happens when the moon comes between the earth and sun
Total Eclipse
occurs when the moon covers the suns entire disk
Partial Eclipse
occurs when the moon only covers part of the suns disk
Annular Eclipse
occurs when a ring shaped portion of the suns disk shows around the moon
Bailys Beads
bright pinpoints of light caused by sunlight shining through valleys
at the moon's edge
Diamond Ring Effect
occurs when there is a last bright sparkling bead along the remaining
thin solar crescent
Lunar Eclipse
occurs when the earth is cutting off light from the sun the normally
reaches the moon
What two theories suggest that the moon at one time was part of the earth?
fission theory
impact theory
what theory suggests at one time he moon was an independent planet
orbiting the sun?
capture theory
which theory suggests that the moon accumulated from a cloud of dust
and gas?
accretion theory