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Star Life Cycles

Total questions: 45

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

All stars begin their life as a

a)

Main Sequence

b)

Solar Nebula

c)

Protostar

d)

Black Dwarf

2.
Our sun is currently in what star stage?
a)
Protostar
b)
Nebula
c)
Main Sequence
d)
Red Giant
3.
______ is a force that causes dust particles to stick together in a nebula.
a)
nuclear fusion
b)
gravity
c)
hydrogen
d)
friction
4.

A gigantic explosion that causes the death of a large star is called

a)

pulsar

b)

red giant

c)

supernova

d)

black hole

5.

A ________ is an object so dense with so much gravity that even light cannot escape.

a)

neutron star

b)

white dwarf

c)

black hole

d)

brown dwarf

6.

The core of a Red Giant that has collapsed and lost its outer layer (that becomes a planetary nebula.) What is leftover becomes a ___________________.

a)

White Dwarf

b)

Blue Supergiant

c)

Red Supergiant

d)

Black Hole

7.

This is an image of the first stage in the formation of a star, also known as a ....

a)

Main Sequence

b)

Planetary Nebula

c)

Supernova

d)

Solar Nebula

8.

The stage after the main sequence star:

a)

red giant

b)

nebula

c)

white dwarf

d)

black dwarf

9.

The super red giant ends its life as a massive explosion called

a)

supernova

b)

planetary nebula

c)

constellation

d)

black dwarf

10.

When nebula is big and hot enough gravity collapses the nebula on itself and a ...................... is made

a)

white dwarf

b)

supernova

c)

protostar

d)

planetary nebula

11.

Black hole ends life of the biggest stars in the universe

a)

true

b)

false

12.

Neutron stars are very small and extremely dense

a)

true

b)

false

13.

Red Giants and Red Super Giants do what kind of fusion?

a)

helium into heavier elements

b)

hydrogen into helium

c)

hydrogen into heavier elements

d)

helium into hydrogen

14.

Our sun will end its life as a black hole

a)

true

b)

false

15.

All stars begin their life as a white dwarf

a)

true

b)

false

16.

Our sun will end its life as a black dwarf

a)

true

b)

false

17.

Most stars are made of which elements?

a)

Helium only

b)

Hydrogen and Oxygen

c)

Hydrogen and Carbon

d)

Hydrogen and Helium

18.
Which of the following list the correct order of the life cycle of massive stars?
a)
Nebula --> protostar --> main sequence --> red supergiant --> supernova --> blackhole
b)
Nebula --> protostar --> main sequence --> red giant --> planetary nebula --> white dwarf --> black dwarf
c)
Nebula --> protostar --> main sequence --> supernova --> red giant --> blackhole
d)
Nebula --> protostar --> blackhole --> red supergiant --> supernova --> main sequence
19.
Which category is our Sun located in?
a)
White Dwarfs
b)
Supergiants
c)
Main Sequence
d)
Giants
20.

What life stage do average mass stars and massive stars NOT share?

a)

supernova

b)

main sequence

c)

protostar

d)

solar nebula

21.
What type of galaxy is this?
a)
Spiral
b)
Elliptical
c)
Irregular
d)
Irrational
22.

What type of galaxy is this?

a)

Spiral

b)

Elliptical

c)

Irregular

d)

The Sun

23.

The reason why the sun looks so bright to us on Earth is because it is the...

a)

Most luminous

b)

Biggest

c)

Warmest

d)

Closest

24.

Look at the H-R diagram. What type of star is

sort of cool and dim?

a)

Supergiants

b)

Red Main Sequence Star

c)

White Dwarfs

d)

Blue Giants

25.
Which is in order from greatest to least mass?
a)
Universe, Sun, Galaxy, Moon
b)
Universe, Galaxy, Nebula, Star
c)
Star, Nebula, Galaxy, Universe
d)
Planet, Moon, Star, Solar System 
26.

Which two opposing forces keep the sun from collapsing on itself and also from exploding?

a)

Nuclear Fusion and Gravity

b)

Gravity and Spring Force

c)

Nuclear Fusion and Normal Force

d)

Tension Force and Frictional Force

27.

Most stars develop from very massive molecular clouds of gas called...

a)

solar nebula

b)

protostars

c)

red giants

d)

planetary nebula

28.

When stars are fusing hydrogen into helium, and are neither expanding nor contracting, they are said to be...

a)

dying

b)

in equilibrium

c)

white dwarfs

d)

red hypergiants

29.

When a large enough mass of interstellar gas compresses, it begins to rotate and glow a little from the friction between gas molecules. At this point, a __________ has formed.

a)

giant molecular cloud

b)

protostar

c)

red giant

d)

planetary nebulae

30.
Stars in the main sequence neither explode nor collapse in on themselves.  What two forces hold the star in balance during this part of its life span.
a)
gravitational pressure pushes in; thermal pressure pushes out
b)
gravitational pressure pushes out; thermal pressure pushes in
c)
cosmic pressure pushes in; thermal pressure pushes out
d)
cosmic pressure pushes out; thermal pressure pushes in
31.

When most of the hydrogen in the core of a main sequence star has been fused into helium, the star...

a)

begins to expand, forming a red giant

b)

begins to contract, forming a white dwarf

c)

collapses in on itself, forming a black hole

d)

explodes in a supernova

32.
A star the size of the sun has a life span of...
a)
About 10 Billion Years
b)
About 10 Million Years
c)
About 10 Trillion Years
d)
About 100 Million Years
33.

A protostar is luminous (gives off light), due to...

a)

gravitational compression and frictional heating

b)

H --> He Fusion

c)

spinning speed

d)

the triple alpha process

34.

After the main sequence, an average mass star becomes a

a)

black dwarf

b)

protostar

c)

red giant

d)

supergiant

35.
After the main sequence, a high mass star becomes a
a)
black dwarf
b)
protostar
c)
red giant
d)
supergiant
36.

The final stage of an average mass star like our sun is a

a)

neutron star

b)

nebula

c)

black hole

d)

black dwarf

37.
A high mass star can end as this stage, which is so dense that not even light can escape!
a)
black dwarf
b)
white dwarf
c)
supernova
d)
black hole
38.
What stage fills in the blank. Nebula --> Main sequence --> red giant --> ______________ --> white dwarf --> black dwaft
a)
supergiant
b)
planetary nebula
c)
black hole
d)
supernova
39.
When a nebula heats up, a "baby" star forms in the middle. It is called a
a)
supernova
b)
supergiant
c)
white dwarf
d)
protostar
40.
Which of the following is NOT a final stage of a star. 
a)
black hole
b)
black dwarf
c)
neutron star
d)
red giant
41.
All stars start as gas and dust in a(n)
a)
nebula
b)
black hole
c)
red giant
d)
black dwarf
42.
What color of star is the hottest?
a)
Blue
b)
Red
c)
Yellow
d)
Orange
43.
The color of the star tells us its 
a)
composition
b)
Temperature
c)
Luminosity 
d)
Mass
44.

What determines if a star becomes a giant or a supergiant?

a)

star mass

b)

star temperature

c)

star color

d)

star luminosity

45.

A star is officially "born" when it

a)

can do nuclear fusion

b)

glows

c)

is round

d)

has gravity

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