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15 Cards in this Set

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  • Back
Axis
An imaginary line that passes through Earth's center and its North and South Poles
Atmosphere
The layer of air that surrounds Earth
Revolve
To travel in a closed path around an object such as Earth does as it moves around the sun
Eclipse
The passing of one object through the shadow of another
Ellipse
A figure shaped like an oval with both ends alike
Rotate
The spinning of Earth on its axis
Full Moon
The moon seen from the Earth as a whole circle
Gibbous
Curved out, humped. A gibbous moon is more than half full but less than full
Waning (Wane)
Lose size, become smaller gradually
Gravity
The natural force that causes objects to move or tend to move toward the center of the Earth.
Telescope
An instrument that magnifies distant objects, or makes them appear larger
Orbit
The path one body in space takes as it revolves around another body; such as that of Earth as it revolves around the sun
Phases of the moon
One of the changing stages of development of the moon's cycle
Reflection
The light energy that bounces off objects
Refraction
The bending of light rays when they pass through a substance