2.4-2.7 Stars

The final stages of a star's life depend on it's mass.

• True

• False

What characteristics of a star can astronomers determine when comparing it's actual brightness to it's apparent brightness?

• Distance from earth

• Age compared to other stars

• Mass to the nearest kilogram

• Temperature compared to other stars

The letters 'O', 'B', 'A', 'F', 'G', 'K' and 'M' arrange stars in order from ___

• hottest to coolest
• coolest to hottest
• largest to smallest
• smallest to largest

A plot of a stars luminosity vs it's temperature is called ___

• an HR diagram, after Hertzsprung and Russell
• an HC diagram, after Hertzsprung and Cannon
• an CR diagram, after Cannon and Russell
• an HS diagram, after Hertzsprung and Saha 

Most stars live the majority of their lives ___.

• as white dwarfs

• along the main sequence

• as red giants

• as red super giants

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

______ is a force that causes dust particles to stick together in a nebula.

• Nuclear fusion

• Gravity

• Hydrogen

• Friction

Most stars are made of which elements?

• Hydrogen only
• Hydrogen and Lithium
• Hydrogen and Sodium
• Hydrogen and Helium

A supergiant might explode and become a_____.

• main sequence stars
• white dwarf
• supernova
• nebula

The brightness of a star as seen from earth

• Apparent magnitude

• Awesome magnitude

• Absolute magnitude

• Amazing magnitude