Classifying Stars and Stellar Evolution

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

What color of star is the coolest?

• Red
• Yellow
• Blue
• White

What is the name of the gas/dust clouds where all stars form?

• Nebulas
• Protostars 
• Supernova
• Neutron Star

The color of a star tells us its

• magnitude
• temperature
• size
• age

The life cycles of stars are determined by their:

• mass (size)
• color
• distance from Earth
• luminosity

Our sun is currently in what star stage?

• Protostar
• Nebula
• Main Sequence
• Red Giant

After the main sequence, a low mass star becomes a

• black dwarf
• protostar
• red giant
• supergiant

After the main sequence, a high mass star becomes a

• black dwarf

• protostar

• red giant

• supergiant

After a supergiant, a high mass star explodes and forms a

• supernova
• red giant
• black hole
• planetary nebula

Where on the HR star diagram are the main sequence stars?

• Top right

• Middle

• Bottom left