Stars and Galaxies Review

What type of Star:

What does a medium sized main sequence star become when fusion slows down?

A Red Giant

What type of Star:

What does a medium sized star become after all fusion stops?

A planetary nebula and then a white dwarf

What type of Star:

What is a small, medium, or large star called when it is fusing hydrogen into helium?

A main sequence star

What type of Star:

What is a large star called when fusion slows down and it begins to fuse heavier elements?

A red super giant

Which stars have the hottest but dimmest stars?

White Dwarfs

Which group of stars have the coolest but the brightest stars?

Red Super giants and Giants

Which group of stars does our Sun belong to?

Main Sequence Stars

Which group of stars has both the hottest and brightest and the coolest and dimmest stars?

Main Sequence Stars

What is the lightest element in the Universe? Hydrogen

What is the main fuel for stars? Hydrogen

When you fuse hydrogen together what is made? Helium

What is made is you fuse two helium atoms together?

Beryllium

What is fusion?

Combining two lighter elements to make one new heavier element and release energy

What does the Law of Conservation of Mass state? Matter is not created or destroyed in

a chemical reaction

What do we mean when we say stars are element builders?

Stars are hot enough to support fusion

Through fusion two lighter elements become one new heavier element.

Through fusion stars can build heavier and heavier elements

What elements are fused during the main sequence? Hydrogen into helium

What elements are fused during the red giant and red supergiant stage?

Helium up through Iron

How are elements heavier than Iron made? Super novas