ING Unit 2: The Universe

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation or energy that travels through space.

Front

Which electromagnetic wave has the lowest energy?

Back

Radio waves.

Front

What type of galaxy is characterized by a spiral shape?

Back

A spiral galaxy.

Front

Which star is the hottest?

Back

A main-sequence blue star.

Front

What is the term for the brightness of a star as seen from Earth?

Back

Apparent magnitude.

Front

What type of electromagnetic waves are used for communication?

Back

Radio waves.

Front

What is the main sequence in the context of stars?

Back

A continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Front

What is a red giant star?

Back

A large star that has expanded and cooled, resulting in a reddish appearance.

Front

What is a white dwarf?

Back

A small, dense star that is the remnant of a larger star after it has exhausted its nuclear fuel.

Front

What is the difference between a star's absolute magnitude and apparent magnitude?

Back

Absolute magnitude is the brightness of a star at a standard distance, while apparent magnitude is how bright the star appears from Earth.