Terms in this set (25)
The centripetal force that holds the Earth in orbit around the sun.
The amount of matter in a substance.(As the mass increases, the gravity increases)
(Gravitational force) changes with location depending on gravity.
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.
Caused by the 23.5 degree tilt of the earth on its axis. (Opposite in Northern and Southern Hemisphere.
When the sun is in the highest and lowest points in the sky. (June 21 & December 21)
When there are exactly 12hrs of night and day. (March 21 & September 21)
The only natural orbiting satellite of earth.
Different shapes of the moon as seen over a period of time. (29.5 days)
When the lighted surface of the moon increases from the right from the new moon to full moon.
When the full moon decreases to new moon.
When the moon is between the sun and Earth. So we do not see the moon because the dark side is facing us.
When whole lighted side is visible.
When we see 1/2 of the lighted side of the moon. Moon, earth and sun are at right angles.
When we see 3/4 of the lighted side of the moon.
When earth's shadow falls on the moon. Can only occur when the moon is in a full moon phase.
When the moon passes between the sun and the earth. Moon's shadow falls on a small portion of the earth.
The shadow directly behind and object. The darkest part of the shadow where 100% of the light is blocked.
The larger, light part of the shadow behind the object. Partial light is blocked.
The side of earth closest to the moon has water pulled towards the moon (away from the earth) which causes a bulge.
Area between tidal bulges with low water level.
When the sun, moon, and earth are in line; tides higher and lower than normal. Occurs 2x a month during new and full moons.
When the sun and the moon are at right angles to earth; tide levels less than normal; can only occur during quarter moon phases.