Unit 7: The Universe Vocab Test

Definition: A normal star that is undergoing nuclear fusion. Our sun is a typical main sequence star.

• Planetary Nebula

• Main Sequence Stars

• Apparent Magnitude

• Brightest Stars

Definition: A contracting cloud of gas and dust; the earliest stage of a star's life.

• Supernova

• Planetary Nebula

• Protostar

• White Dwarf

Definition: Oldest galaxies, containing only old stars and no nebula.

• Milky Way Galaxy

• Elliptical Galaxy

• Planetary Nebula

• Irregular Galaxy

Definition: Also called dwarf galaxies, are composed of only younger stars and nebula.

• Irregular Galaxy

• Elliptical Galaxy

• Planetary Nebula

• Spiral Galaxy

Definition: Well-tested explanation that unifies a broad range of observations.

• Scientific Theory

• Universe

• Scientific Model

• Galaxy

Definition: An instrument that separates light into different wavelengths.

• Planetary Nebula

• H-r Diagram

• Spectroscope

• Microscope

Definition: Smallest and dimmest stars.

• Supernova

• White Dwarf

• Red Stars

• Blue Stars

Are the hottest stars.

• Red Stars

• Yellow Stars

• Blue Stars

• White Dwarf

Definition: are at the bottom of the HR diagram

• Blue Stars

• Dimmest Stars

• Brightest Stars

• Light Year

Definition: are the coolest stars

• Yellow Stars

• Red Stars

• White Dwarf

• Blue Stars