Earth, Moon, and Sun vocabulary

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

The force of gravity on an object.

The two days of year which the sun reaches its greatest distance north or south of the equator.

The amount of matter in an object.

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

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

A device built to observe distant objects by making them appear closer.

Speed in a given direction.

The scientific law states an object at rest will stay at direction unless acted on by a force.

The blocking sunlight to the moon that occurs when Earth directly between the sun and the moon.

A chunk of rock or dust in space.

The blocking sunlight to Earth that occurs when the moon is directly between the sun and Earth

The part of a shadow surrounding the darkest part.

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

imaginary line passes through Earth´s center and the North and South poles which Earth rotates

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

The spinning motion of a planet on its axis

A push or a pull exerted on an object

The movement of an object around another object.

The velocity a rocket must achieve to establish an orbit around a body in space.

The darkest part of a shadow.

The reaction force that propels a rocket forward.

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

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

The study of the moon, stars and other objects in space

The velocity a rocket must reach to fly beyond a planet’s or moon’s gravitational pull.

A device that expels gas in one direction to move in the opposite direction.

A spacecraft can carry crew into space return to Earth and then be reused for the same purpose.

A large round pit caused by the impact of a meteoroid.

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

A small robotic space probe that can move about the surface of a planet or moon.

spacecraft various scientific instruments can collect data visual images but has no human crew.

The daily rise and fall of Earth’s waters on its coastlines.

A large artificial satellite on which people can live and work for long periods.

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

A force that moves rocks and other materials downhill.

An object that revolves around another object in space.