the same side of the moon always faces...?
the Earth
are a "day" and a "year" on the moon the same length?
yes
what causes phases of the moon, eclipses, and tides?
the changing relative positions of the moon, Earth and sun
the different shapes of the moon you see from Earth are called...?
phases
what are neap tides?
a tide with the least difference between consecutive low and high tides.
what are spring tides?
a tide with the greatest difference between consecutive low and high tides.
how are tides caused?
mainly by differences in how much the moon's gravity pulls on different parts of Earth.
what is a lunar eclipse?
the blocking of the sunlight between the Earth and the moon that occurs when Earth is directly between the sun and the moon.
what is a solar eclipse?
the blocking of sunlight to Earth that occurs when the moon is directly between the sun and the Earth.
what is an eclipse?
the partial or total blocking of one object in space by another.
what causes an eclipse?
the moon's shadow hitting Earth or Earth's shadow hitting the moon.
what does the phase of the moon you see depend on?
how much of the sunlit side of the moon faces the Earth.
what is a penumbra?
the largest part of the moon's shadow during a solar eclipse
how much sun is visible from Earth in the penumbra during a solar eclipse?
part
differences in the moon's pull on different parts of Earth cause what?
tides
what is an umbra?
the very darkest part of the moon's shadow which is cone-shaped.
what force pulls the Earth and moon toward each other?
gravity
what phases of the moon are possible to occur during a spring tide?
new moon and full moon
the point on Earth that is closest to the moon has a what tide?
high
every location on Earth has how many tides per month?
2
the rise and fall of the ocean water are called what?
tides
what causes a solar eclipse?
the moon passing directly between Earth and the sun
what happens during a total solar eclipse?
the sky grows dark.
what is the arrangement of Earth, the moon, and the sun during a lunar eclipse?
moon, Earth, sun
when does a partial lunar eclipse occur?
when the moon passes partly into the umbra of the Earth's shadow.
is the near side of the moon (facing Earth) always facing the dark side?
no b/c it depends on how much of the near side of the moon is facing the Earth.
what percentage of the dark side of the moon do you see during the first and third quarters?
50%
what can you see during a new moon?
the side of the moon facing Earth is dark.
What can you see during a first quarter moon?
half of the sunlit side of the moon.
what can you see during a full moon?
entire sunlit side of the moon faces the Earth.
what can you see during a third quarter moon?
half of the moon's lighted side.
how often does the moon go through an entire set of phases?
each time it takes a complete revolution around the Earth.
how long does the moon take to rotate once on its axis?
the same amount of time as it revolves around Earth.
what is the celestial equator?
the imaginary extension of Earth's equator into the solar system.
how often do moon phases change?
28 days