Terms in this set (25)
The centripetal pulling force that holds the Earth in its orbit around the sun.
The measure of how much matter is in an object (never changes).
the heaviness of a person or thing
the spin of an object on its axis
movement of an object in an orbit around another larger object
the path that a revolving object takes around another object
cause by the tilt of earth on its axis. Because of the angle of the tilt the Earth receives different amounts of daylight hours and concentration of the light energy over each hemisphere
days with the least and most amount of sunlight (June 21 and Dec 21)
days when the number of daylight and dark hours are equal (May 21 and Sept 23)
the only natural orbiting satellite of the Earth
different shapes of the moon as seen over a period of time 29.5 days; depends on its position around the Earth and the portion of the visible surface seen
lighted surface of the moon increases from new moon to full moon
lighted surface of the moon is decreasing from the right up from full moon to new moon
the moon is between the sun and earth, completely dark
we see the entire lighted half of the moon
half the moon is showing
when 3/4 of the moon is showing
occurs when the earth's shadow fall on the moon; can only occur when moon is in full moon phase
occurs when the moon passes between the sun and the Earth, and casts a shadow over part of the earth
shadow directly behind the object. darker part of the shadow. All light is blocked
larger shadow behind object. Lighter part of the shadow; partial light blocked
The side of the earth closest to the moon has its water pulled toward the moon which causes a bulge. High tides always follow the moon
the area between tidal bulges with low water levels
when the sun, moon, and earth are in a line. Tides are higher and lower than normal.
sun and moon are at the right angles of the earth. High and low tides are not as high or as low. Can only occur during quarter phases of the moon
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