Life Cycle Of Stars

Front 1

The hierarchy of the universe in order from least to greatest is ____.
universe, solar system, earth, milky way galaxy, local group

Back 1

earth, solar system, milky way galaxy, local group, universe

Front 2

What is a stellar nursery?

Back 2

the birthplace of stars

Front 3

A protostar is like a ____ star.

Back 3

baby or very young star

Front 4

During nuclear fusion
____ turns into _______.

Back 4

hydrogen turns into helium

Front 5

Nuclear fusion creates _____/_____ and makes the star _______.

Back 5

energy/heat
ignite

Front 6

What phase will last the longest during the lifetime of a star?

Back 6

main sequence

Front 7

What happens to a star after its main sequence depends entirely on its ____/____.

Back 7

mass or size

Front 8

Our sun is a ____-____ star.

Back 8

mid-sized

Front 9

When a star uses up all of the ________ in its core, it ___ to many times the size of its original form. The outside of the star starts to cool, and this star becomes a _______.

Back 9

hydrogen, expands, red giant

Front 10

a planetary nebula is a __________________________.

Back 10

cloud of gas and dust leftover from a red giant shrinking

Front 11

stars much bigger than our sun explode into a _________.

Back 11

supernova

Front 12

The clouds of gas and dust that a supernova spews out can lead to the formation of new _____.

Back 12

stars

Front 13

The core of a leftover supernova can become a _______ ____.

Back 13

neutron star

Front 14

Neutron stars spin rapidly emitting pulses of radio waves; these are known as the _______.

Back 14

pulsars

Front 15

Not even _____ can escape a black hole.

Back 15

light

Front 16

A star's life cycle is dependent on its ____.

Back 16

mass

Front 17

Stars are born in stellar nurseries, also called ______.

Back 17

nebulae

Front 18

Nebulae are vast clouds of ___ and ____.

Back 18

gas and dust

Front 19

Over millions of years gravity causes the atoms of ________ to collect in the cloud, causing the cloud to spin faster and faster

Back 19

hydrogen

Front 20

Hydrogen combines with ________ to create ______ inside of the star.

Back 20

hydrogen helium

Front 21

After the protostar stage, a star enters the ____ ________ stage.

Back 21

main sequence

Front 22

Ultimately, a star's main source of fuel is ________.

Back 22

hydrogen

Front 23

Once all the hydrogen in a small/medium sized star has been depleted,it converts helium into ______ and ______.

Back 23

carbon and oxygen

Front 24

Small Mass Star
As the outer shell expands the temperature _________ and the star begins to glow ___. This star is now a ___ ______

Back 24

decreases
red
red giant

Front 25

Follows Red Giant Stage

The star uses the rest of its time to ______ and ____ ____. Eventually, the carbon core collapses, and the star is now a ___ ___.

Back 25

shrink
cool down
white dwarf

Front 26

White dwarfs shine with a _____ ___ light. Once all their energy is gone they can no longer emit _____, and ultimately become a __ forever.

Back 26

white hot
light
black dwarf

Front 27

Once massive stars reach the red giant phase the core temperature _________ to over ___ _______ degrees. the _____ core starts to ______ energy like a sponge. all of this built up energy results in a tremendous explosion called a _________.

Back 27

increases
100 billion
iron
absorb
supernova

Front 28

Sometimes a supernova leaves behind a dense fast-spinning star called a ________ _____.

Back 28

neutron star
pulsars

Front 29

If the remnant of a supernova is so great the carbon core may contract inward on itself creating a _____ _____. No light can escape.

Back 29

black hole