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Semester II Exam

Terms

QuestionAnswer
Cloud of dust and gas where stars are born. Nebula
The distance light travels in one year. Light-year
The distance between the Earth and the sun. Astronomical Unit
Spinning on an axis. Rotation
The elliptical path of one body as it orbits another body in space. Revolution
The time it takes Earth to revolve around the sun one time. Year
The time it takes the moon to revolve around the Earth once. Month
The time it takes Earth to rotate once on its axis. Day
The natural rise and fall of water caused by the gravitational pull of the moon and Earth. Tides
An artificial or man-made body that revolves around another body. Satellite
The different appearances of the moon based on its position around the Earth. Phases
The sunlit fraction of the moon is getting larger. Waxing
The sunlit fraction of the moon is getting smaller. Waning
When the sun, Earth, and moon are aligned and the shadow of the Earth falls on the moon. Lunar Eclipse
When the sun, moon, and Earth are aligned and the shadow of the moon falls on the Earth. Solar Eclipse
The shape of the orbit of a comet. Highly Elliptical
Dust,gas, and ice also called a "dirty snowball". Comet
Small rocky bodies in orbit around the sun. Asteroids
Rocky bodies that are smaller than asteroids orbiting the sun. Meteoroids
Bright streak of light caused by a meteoroid burning up in the atmosphere. Meteor
A meteoroid that strikes Earth's surface. Meteorite
A galaxy with a bulge at the center and blue arms. The Milky Way is this type. Spiral
A galaxy with a bright center, oval in shape and very little dust and gas. Elliptical
A galaxy that has no specific shape. Irregular
The youngest stars on the main sequence. Massive Blue Stars
The actual brightness of a star. Absolute Magnitude
How bright a star looks. Apparent Magnitude
Created by: pverschoore
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