Vocab 1
The study of the moon, stars, and other objects in space
Astronomy
the spinning motion of a planet on its axis
Rotation
the movement of an object around another object
Revolution
the amount of matter in an object
mass
the periodic rise and fall of the level of water in the ocean
Tide
the partial or total blocking of one object in space by another
Eclipse
one of the different apparent shapes of the moon seen from earth
phases
Earth's Tilt
23.5 degrees
What is an orbit?
the path of an object as it revolves around another object in space
What is an axis?
An imaginary line that passes through Earth’s center and the North and South poles, about which Earth rotates
What is a force?
a push or pull exerted on an object
What is weight?
the force of gravity on an object
Definition of a solar eclipse
the blocking of sunlight to Earth that occurs when the moon is directly between the sun and the Earth
What is gravity?
the attractive force between objects; its strength depends on their masses and the distance between them
the two days of the year on which neither hemisphere is tilted toward or away from the sun
equinox
Definition of a solar eclipse
the blocking of sunlight to Earth that occurs when the moon is directly between the sun and the Earth
What is Newton's First Law of Motion
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
The Law of Universal Gravitation states
the scientific law that states that every object in the universe attracts every other object
Definition of a lunar eclipse
the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
the two days of the year on which the sun reaches its greatest distance north or south of the equator
Solstice