all of it Flashcards
(16 cards)
What changes how the moon looks to the human eye is due to?
position of the moon in its orbit
as the moon changes from first to third quarter, the visible portion of the moon as observed form earth will
increase, then decrease
the gravitational force between 2 objects is most affected by their…?
mass and distance apart
why can humans on earth see the moons surface?
Because the moon reflects sunlight
why can different phases of the moon be observed by earth?
because differing amounts of moons sunlit surface are seen because the moon revolves around earth
how long does it take for the moon to revolve around earth?
1 month (around 4 weeks)
about how long does it take for the moon to go from north to south
2 weeks
what are the relative positions sun earth and moon for a full moon (use letters)
S E M
what does waxing mean?
growing in light
how much of the moon is ALWAYS lit at any time
50%
Why do sometimes New Moon phase positions don’t occur and not cause an eclipse?
due to moons orbit tilted in relation to the Earth’s orbit
when Earth’s shadow falls on the moon, what happens?
the shadow causes a lunar eclipse
what are tides caused by?
gravitational pull of the moon and sun
how many high and low tides are on earth at any given time?
two high, two low
which season high tide has higher than normal water levels
spring
