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Study Guide: Earth/Moon
Study Guide on the Earth and Moon
18
Science
8th Grade
02/15/2012

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Cards

Term
How long is Earth's revolution around the sun?
Definition
365 1/4 days
Term
What are tides caused by?
Definition
The moons gravitational pull.
Term
Why does Earth have seasons?
Definition
Because of Earth's tilt on it's axis.
Term
How are day & night caused?
Definition
They are caused by the Earth's rotation.
Term
How long does Earth's rotation take?
Definition
24 hours
Term
When does a solar eclipse occur?
Definition
It occurs when the Moon moves directly between the Sun and Earth and throws a shadow on Earth.
Term
When do neap tides occur?
Definition
When the first and third quarter Moons happen.
Term
Why do we always see the same side of the moon?
Definition
Because the moon rotates at the same rate it revolves.
Term
During what phase can a lunar eclipse occur?
Definition
A Full Moon
Term
What is Earth's revolution?
Definition
It is it's yearly orbit around the Sun
Term
When does an equinox occur?
Definition
It occurs when the Earth is tilted neither toward or away from the sun.
Term
When are tides the highest?
Definition
They are the highest on New and Full moons.
Term
What phase of the Moon immediately precedes the New Moon?
Definition
Waning Crescent
Term
What is the tidal range?
Definition
It is the difference between the high and low tides distance and water levels.
Term
What are tides?
Definition
They are the regular rising and falling of the ocean's surface.
Term
What is the penumbra?
Definition
It is the region in which only a portion of the light source is obscured by the occluding body.
Term
What is the umbra?
Definition
It is the innermost & darkest part of the shadow, where the light source is completely blocked by the occluding body.
Term
What are all the phases of the Moon?
Definition
New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full moon, Waning Gibbous, Third Quarter, Waning Crescent.
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