Lesson 3 quiz science Flashcards | Quizlet
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Lesson 3 quiz science

Terms in this set (34)

Define umbra
The central, darker part of the shadow where light is totally blocked
Define penumbra
the lighter part of a shadow where light is partially blocked
When Earth, the Moon, and the Sun are lined up, the moon casts a __________ on Earths surface.
Shadow
What Moon phase does a Solar eclipse happen during?
New Moon Phase
Define Solar Eclipse
when the Moon's shadow appears on Earth's surface
The type of eclipse you see depends on whether you are in the path of the ______ or ____________
Umbra, Penumbra
If you are outside the umbra and penumbra, you ____ see a solar eclipse.
cannot
You can only see a total eclipse from within the earths _________
Umbra
What happens during a Total eclipse?
The moon appears to cover the sun completely . Then the sky becomes dark enough where you can no longer see stars.
How long does a Total eclipse last for?
No longer than about 7 minutes
You can only see a partial Solar eclipse from within the Moons much _______ ____________
Larger, Penumbra
What happens during a Partial Solar eclipse?
Same stages as Total solar eclipse but the Moon never completely covers the sun.
Why don't eclipses occur every month?
because the Earth is mostly always either slightly below or above the Moons shadow
What does a solar eclipse look like?
Sun, Moon, Earth
Define lunar eclipse
occurs when the Moon moves into Earths shadow
In what Moon phase can a lunar eclipse occur?
Full Moon Phase
You can see any Lunar eclipse from from any location on the side of earth facing the _________
Moon
When the entire moon moves through the Earths ___________, a Total eclipse occurs
Umbra
Why can you still see the Moon even when its completely within Earths umbra during a Total lunar eclipse? And what causes the moon to be red sometimes?
because earths atmosphere deflects some sunlight into Earths umbra. The reflected light has a a reddish color which gives the moon a reddish color.
When ____ of the moon passes through Earths umbra, a partial Lunar eclipse occurs
only part
What happens during a partial lunar eclipse?
Same stages as a total lunar eclipse but the moon is never completely covered by earths umbra.
What two things effect Earths oceans?
The moon and Sun
Define Tide
daily rise and fall of sea level
How many times do oceans rise and fall each day?
Twice each day
What does a lunar eclipse look like?
Sun, Earth, Moon
High tides occur at ______ __________ and Low tides occur __________ them
tidal buldges, between
what differences cause tidal buldges?
the difference between Moons gravity stronger on the side of earth closer to the sun and weaker on the side of the earth farther from the Moon.
The suns effect on tides is about half that of the moons. Whys that?
Because the sun is farther away from Earth then the Moon is.
When do spring tides occur?
new and full moon
What happens during a spring tide?
The sun and Moons gravitational forces combine and produce higher high tides, and lower low tides
When do neap tides occur?
first and third quarter and when the Sun, Moon, and Earth make a right angle.
What happens during a neap tide?
The suns effect on tides reduces the moons effect on tides which then causes lowest high tide and highest low tide.
What does a spring tide look like?
The sun, earth, and moon are in a straight line.
What does a neap tide look like?
The sun, earth, and moon are in a right angle
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