An object that orbits the planet

An object that orbits a star, is large enough to have become rounded by it's own gravity, and has cleared the area of it's orbit.

A streak of light in the sky produced by the burning of a meteoroid in Earth' s atmosphere.

A loose collection of ice and dust that orbits the sun, typically in a long narrow orbit.

A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.

A pattern or grouping of stars that people imagine to represent a figure or object.

A imaginary line that passes through a planet's center and it's north and south poles, about which the planets rotate.

A spinning motion of a planet on it's axis.

The movement of a object around another object.

The path of an object as it revolves around another object in space.

A system of organizing time that defines the beginning, length, and divisions of the year.

Either of the two days of the year on which the sun reaches it's greatest distance north or south of the equator.

Either of the two days of the year on which neither hemisphere is tilted toward or away from the sun.

A push or pull exerted on an object.

The attractive force between objects; the force that moves objects downhill,.

Law of universal gravitation

The scientific law that states that every object in the universe attracts every other object.

The amount of matter in an object..

A measure of the force of gravity on an object.

The tendency of a object to resist a change in motion.

Newton's first law of motion

The scientific law that states that an object at rest will stay at rest and a object in motion will stay in motion with a constant speed and direction unless acted on by a force.

One of the different apparent shapes of the moon as seen from earth.

The partial or total blocking of one object in space by another.

The blocking of sunlight to earth that occurs when the moon is directly between sun and earth.

The part of the shadow surrounding the darkest part.

The blocking of sunlight to the moon that occurs when the earth is directly between the sun and the moon.

The periodic rise and fall of the level of water in the ocean.

The tide with the greatest difference between consecutive low and high tides.

The tide with the least difference between consecutive low and high tides.

Dark, flat areas on the moon's surface formed from huge ancient lava flows.

A large round pit caused by impact of a meteoroid.

A chunk of rock or dust in space , generally smaller than an asteroid.

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Chapter 1

Term	Definition
Satellite	An object that orbits the planet
Planet	An object that orbits a star, is large enough to have become rounded by it's own gravity, and has cleared the area of it's orbit.
Meteor	A streak of light in the sky produced by the burning of a meteoroid in Earth' s atmosphere.
Comet	A loose collection of ice and dust that orbits the sun, typically in a long narrow orbit.
Star	A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.
Constellation	A pattern or grouping of stars that people imagine to represent a figure or object.
Axis	A imaginary line that passes through a planet's center and it's north and south poles, about which the planets rotate.
Rotation	A spinning motion of a planet on it's axis.
Revolution	The movement of a object around another object.
Orbit	The path of an object as it revolves around another object in space.
Calender	A system of organizing time that defines the beginning, length, and divisions of the year.
Solstice	Either of the two days of the year on which the sun reaches it's greatest distance north or south of the equator.
Equinox	Either of the two days of the year on which neither hemisphere is tilted toward or away from the sun.
Force	A push or pull exerted on an object.
Gravity	The attractive force between objects; the force that moves objects downhill,.
Law of universal gravitation	The scientific law that states that every object in the universe attracts every other object.
Mass	The amount of matter in an object..
Weight	A measure of the force of gravity on an object.
Inertia	The tendency of a object to resist a change in motion.
Newton's first law of motion	The scientific law that states that an object at rest will stay at rest and a object in motion will stay in motion with a constant speed and direction unless acted on by a force.
Phase	One of the different apparent shapes of the moon as seen from earth.
Eclipse	The partial or total blocking of one object in space by another.
Solar eclipse	The blocking of sunlight to earth that occurs when the moon is directly between sun and earth.
Umbra	The darkest part of a shadow.
Penumbra	The part of the shadow surrounding the darkest part.
Lunar eclipse	The blocking of sunlight to the moon that occurs when the earth is directly between the sun and the moon.
Tide	The periodic rise and fall of the level of water in the ocean.
Spring tide	The tide with the greatest difference between consecutive low and high tides.
Neap tide	The tide with the least difference between consecutive low and high tides.
Maria	Dark, flat areas on the moon's surface formed from huge ancient lava flows.
Crater	A large round pit caused by impact of a meteoroid.
Meteoroid	A chunk of rock or dust in space , generally smaller than an asteroid.

Created by: user-1975242

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