AMSTI SSE Lesson 1 Vocabulary

Front

Celestial Body

Back

A natural object in space, such as a planet, star, or moon.

Front

Diameter

Back

The length of a straight line passing through the center of a circle or sphere from one side to the other.

Front

Gravity

Back

The force that attracts a body toward the center of the earth, or toward any other physical body having mass.

Front

Lunar Phase

Back

The shape of the directly sunlit portion of the Moon as viewed from Earth.

Front

Mass

Back

A measure of the amount of matter in an object, typically in kilograms or grams.

Front

Model

Back

A representation of an object, system, or concept that is used to describe and predict its behavior.

Front

Orbit

Back

The curved path of a celestial object or spacecraft around a star, planet, or moon.

Front

Ratio

Back

A relationship between two numbers indicating how many times the first number contains the second.

Front

Satellite

Back

An artificial body placed in orbit around the earth or another planet to collect information or for communication.

Front

Scale

Back

The ratio of the size of a model or representation to the actual size of the object it represents.