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Earth, Moon, and Sun

The study of the moon, stars, and other objects in space. Astronomy
An imaginary line that passes through Earth’s center and the North and South poles, about which Earth rotates. Axis
The spinning motion of a planet on its axis Rotation
The movement of an object around another object. Revolution
The path of an object as it revolves around another object in space. Orbit
A system of organizing time that defines the beginning, length, and divisions of a year. Calendar
The two days of the year on which the sun reaches its greatest distance north or south of the equator. Solstice
The two days of the year on which neither hemisphere is tilted toward or away from the sun. Equinox
A push or a pull exerted on an object. force
The attractive force between objects; its strength depends on their masses and the distance between them. gravity
The scientific law that states that every object in the universe attracts every other object. law of universal gravitation
The amount of matter in an object mass
The tendency of an object to resist a change in motion. inertia
The scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force. Newton’s first law of motion
One of the different apparent shapes of the moon as seen from Earth. phases
The partial or total blocking of one object in space by another. eclipses
The blocking of sunlight to Earth that occurs when the moon is directly between the sun and Earth. Solar eclipse
The darkest part of a shadow. umbra
The part of a shadow surrounding the darkest part. penumbra
The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon. lunar eclipse
The periodic rise and fall of the level of water in the ocean. tides
The tide with the greatest difference between consecutive low and high tides. spring tide
The tide with the least difference between consecutive low and high tides. neap tide
A device built to observe distant objects by making them appear closer. telescope
Dark, flat areas on the moon’s surface formed from huge ancient lava flows. maria
A large round pit caused by the impact of a meteoroid. A large round pit caused by the impact of a meteoroid.
A chunk of rock or dust in space. meteoroids
Created by: MrCscience
Popular Physical Science sets




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