Lifecycle Of Stars

How do main sequence stars like the sun make their energy?

• fusion of hydrogen into helium

• fission of hydrogen into helium

• fusion of helium into hydrogen

• fission of helium into hydrogen

Stars are born in

• the big bang

• black holes

• protoplanetary disks

• nebulae

A star's luminosity is a measure of how ___________ the star is

• big

• bright

• hot

• massive

Compared to a yellow star, a blue star is always ________

• hotter

• colder

• bigger

• smaller

After a small star has used up all of it's hydrogen, it will become a......

• white dwarf

• red giant

• interstellar cloud

• supernova

True or False: All stars will eventually become a black hole

• True

• False

When a supergiant runs out of fuel for fusion it will collapse in on itself and explode in a ....

• big bang

• black hole

• nebula

• supernova

After a supernova explosion, if the core leftover is very massive it will become a ...

• black hole

• white dwarf

• neutron star

• supergiant

Look at the H-R diagram. Which star is
sort of cool, dim (not too much light), and red?

• Betelguse
• Sirius B
• Procyon B
• Barnard's star

Which star is likely to be the hottest? Use the H-R diagram

• Type B Star

• White Dwarf

• Red Giant

• Type G Star (Sun)