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Earth and It's Moon
Earth,moon,sun,and space
32
Science
8th Grade
10/23/2006

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Cards

Term
Summer Solstice
Definition
The longest day of the year when the sun seems to stop moving higher in the sky each day.
Term
Winter Solstice
Definition
The shortest day of the year when the sun can not get any lower in the sky.
Term
Vernal Equinox
Definition
Neither the north pole nor the south pole are tilted toward the sun. Spring begins.
Term
Autumnal Equinox
Definition
Neither the north pole nor the south pole are tilted toward the sun. Fall begins.
Term
Magnetosphere
Definition
Earth's magnetic field
Term
Van Allen radiation belts
Definition
Two doughnut-shaped regions of charged particles that trap some of the particles in solar wind.
Term
Aurora
Definition
The collisions of charged particles trapped by the Van Allen radiation belts with particles in the Earth's upper atmosphere.
Term
Highlands
Definition
Areas of mountains on the moon
Term
Maria
Definition
Broad, lowland plains that surround the mountains on the moon.
Term
Rilles
Definition
Long valleys that criss cross the moon's surface, possibly caused by volcanoes.
Term
Perigee
Definition
The point of the moon's orbit closest to Earth.
Term
Apogee
Definition
The point of the moon's orbit farthest from the Earth.
Term
Solar Eclipse
Definition
When the new moon comes directly between the sun and the Earth.
Term
Umbra
Definition
The small, inner shadow in an eclipse.
Term
Penumbra
Definition
The large, outer shadow of an eclipse.
Term
Lunar Eclipse
Definition
When the Earth comes directly between the sun and the full moon.
Term
Tides
Definition
The rise and fall of the oceans caused by the Earth's gravity.
Term
Spring Tides
Definition
Tides that are higher during the full moon and the new moon.
Term
Neap Tides
Definition
Lower tides when the moon is at the first and last quarter phases.
Term
Geosynchronus Orbit
Definition
An orbit that revolves around the Earth at a rate equal to the Earth's rotation rate.
Term
Artificial Sattelites
Definition
Communicatons, weather, navigation, scientific.
Term
Explorer I
Definition
First Satellite launched by the US.
Term
Skylab
Definition
A space station launched by the US designed to allow astronauts to perform experiments in space.
Term
Spacelab
Definition
this has replaced the Skylab. It is launched by the Space Shuttle.
Term
Craters
Definition
Funnel-shaped pit or depression on the moon's surface.
Term
Copernicus
Definition
Largest crater on the moon's surface.
Term
Origin of the Moon
Definition
1. It was captured by the Earth's gravity.

2. It was formed from the same swirling cloud of gas and dust from which the sun, Earth, and other planets were formed.

3. Born when a meteorite struck the Earth and tore a chunk of material from the planet.
Term
Lunar Orbiter
Definition
The space probe that photographed the side of the moon away from the earth.
Term
Eastward
Definition
The direction the moon moves.
Term
Neil Armstrong
Definition
The first human to set foot on the moon.
Term
Eagle
Definition
The Lunar Module used to explore the moon.
Term
Columbia
Definition
The command module that orbited the moon with Michael Collins inside while Neil Armstrong and Edwin Aldrin explored the moon.
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