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Star Lifespan and Evolution

Total questions: 35

Worksheet time: 20mins

Name
Class
Date
1.
What factor primarily determines the lifespan of a star?
a)
Temperature
b)
Mass
c)
Luminosity
d)
Chemical composition
2.
Why do larger stars die faster than smaller stars?
a)
They have less hydrogen fuel
b)
They have more gravitational forces leading to faster fusion
c)
They are cooler in temperature
d)
They emit more light
3.
What is the remnant of a star like the Sun after it becomes a red giant?
a)
Neutron star
b)
Black hole
c)
White dwarf
d)
Black dwarf
4.
What is the main sequence in the context of stars?
a)
A stage where stars are born
b)
A stage where stars are dying
c)

A stage where stars burn Hydrogen

d)
A type of star cluster
5.
What color are the hottest stars on an HR diagram?
a)
Red
b)
Blue
c)
Yellow
d)
White
6.
How does a star's position on the HR diagram change throughout its lifetime?
a)
It remains constant
b)
It moves from the main sequence to the red giant phase
c)
It moves from the red giant phase to the main sequence
d)
It moves randomly
7.
What information do the axes on an HR diagram provide?
a)
Temperature and luminosity
b)
Mass and age
c)
Color and size
d)
Distance and brightness
8.
What is the relationship between a star's color and its surface temperature?
a)
Red stars are the hottest
b)
Blue stars are the hottest
c)
Yellow stars are the coolest
d)
White stars are the coolest
9.
How might the HR diagram for a young star cluster differ from that of an old star cluster?
a)
Young clusters have more red giants
b)
Old clusters have more main sequence stars
c)
Young clusters have more main sequence stars
d)
Old clusters have more blue stars
10.
What type of star is likely to have a luminosity of 900 and a temperature of 6000 K?
a)
Red giant
b)
Main sequence star
c)
White dwarf
d)
Neutron star
11.
What is the relative age of a star with a luminosity of 900 and a temperature of 6000 K?
a)
Early age
b)
Middle age
c)
Late age
d)
End of life
12.
How can absorption spectra be used to identify elements inside a star?
a)
By measuring the star's brightness
b)
By analyzing the dark lines in the spectrum
c)
By observing the star's color
d)
By calculating the star's mass
13.
Where do all the elements in the universe come from?
a)
The Big Bang
b)
Nuclear fusion in stars
c)
Black holes
d)
Dark matter
14.

What happens to a massive star after it exhausts its nuclear fuel?

a)
It becomes a black hole
b)
It becomes a white dwarf
c)
It becomes a neutron star
d)
It becomes a red giant
15.
What is the primary fuel for stars during their main sequence phase?
a)
Helium
b)
Carbon
c)
Hydrogen
d)
Oxygen
16.
What is the significance of the main sequence on the HR diagram?
a)
It represents the birth of stars
b)
It represents the stable phase of stars
c)
It represents the death of stars
d)
It represents the remnants of stars
17.
How does the mass of a star affect its evolution and lifespan?
a)
Higher mass leads to longer lifespan
b)
Higher mass leads to shorter lifespan
c)
Mass has no effect on lifespan
d)
Mass only affects the star's color
18.

What is the final stage of evolution for a star like Proxima Centauri (low mass star)?

a)
Black hole
b)
White dwarf
c)
Red giant
d)
Neutron star
19.
What is the primary factor determining the life and death of a star?
a)
Temperature
b)
Mass
c)
Color
d)
Age
20.
What is the approximate lifespan of our Sun?
a)
1 billion years
b)
5 billion years
c)
10 billion years
d)
100 billion years
21.
What will the Sun become in its old age?
a)
White dwarf
b)
Neutron star
c)
Black hole
d)
Red giant
22.
What is the final remnant stage for a star like our Sun?
a)
Black hole
b)
Neutron star
c)

White Dwarf

d)
Red giant
23.
What is the primary fuel for stars?
a)
Helium
b)
Carbon
c)
Hydrogen
d)
Oxygen
24.
What is the balance that determines a star's life?
a)
Mass and temperature
b)
Fusion and fission
c)
Gravitational forces and fusion
d)
Expansion and contraction
25.
What are the two axes typically found on an HR diagram?
a)
Mass and radius
b)
Temperature and luminosity
c)
Age and color
d)
Density and volume
26.
Which color represents the hottest stars on an HR diagram?
a)
Red
b)
Yellow
c)
White
d)
Blue
27.
How would the HR diagram for a young star cluster differ from an old star cluster?
a)
It would have more stars in the main sequence
b)
It would have more red giants
c)
It would have more white dwarfs
d)
It would be exactly the same
28.
Why does the Earth depend on the Sun as a source of energy?
a)
The Earth has no internal energy
b)
The Sun's nuclear fusion provides a constant energy source
c)
The Earth is too small to generate its own energy
d)
The Sun's gravity powers the Earth
29.

A star (no matter what its mass) spends most of its life:

a)

As a main-sequence star

b)

As a proto-star

c)

as a planetary nebula.

d)

as a red giant or supergiant.

e)

as a T Tauri variable star.

30.

Match the following

a)

star left at the core of a planetary nebula

1.

White dwarf

b)

a red super giant star explodes

2.

Supernova

c)

what a medium-mass star becomes at the end of its life

3.

black dwarf

d)

a large cloud of gas or dust in space

4.

Nebula

e)

the remains of a high mass star

5.

Neutron star

31.

What small, hot, faint objects are found at B?

a)

neutron stars

b)

black holes

c)

white dwarfs

d)

brown dwarfs

32.
Very massive stars eventually collapse into what final star remnant?
a)
Neutron stars
b)
Black holes
c)
White dwarfs
d)
Protostars
33.

In a high mass star, at the end of the red super giant phase, the gravity causes the star to rapidly collapse. This collapse causes a massive explosion called a __________

a)

White Dwarf

b)

Planetary Nebula

c)

Supernova

d)

Neutron Star

34.

When astronomers discuss a nebula, what are they talking about?

a)

the Frisbee-shaped collection of gas that covers the entire Milky Way Galaxy

b)

the cloud of comets that lies on the outskirts of the solar system

c)

a giant cloud of gas and dust between or among the stars

d)

none of these

35.

Nuclear fusion occurs in the sun's ​ (a)   where ​ (b)   is converted into ​ (c)  

Choose from the below words
core
hydrogen
helium
corona
iron
photosphere

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