Vocabulary Flashcard: When is a Planet Not a Planet?

Front

What is the definition of 'diameter'?

Back

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

Front

What does 'astronomical' mean?

Back

Related to the science of the sun, stars, planets, and space objects.

Front

What does the word 'approximately' mean?

Back

Nearly correct or exact.

Front

The word 'astronomical' is related to which field?

Back

Astronomy.

Front

What are 'spheres'?

Back

Anything that is shaped like a ball or globe.

Front

What is the definition of 'planet'?

Back

A celestial body that orbits a star and is large enough to be rounded by its own gravity.

Front

What is the difference between a planet and a dwarf planet?

Back

A dwarf planet does not clear its orbit of other debris, while a planet does.

Front

What is the term for the path a planet takes around a star?

Back

Orbit.

Front

What is gravity?

Back

A force that attracts two bodies towards each other.

Front

What is the definition of 'celestial'?

Back

Related to the sky or outer space.