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Unit 6 Stars Test Review

Total questions: 76

Worksheet time: 48mins

Name
Class
Date
1.

What is a star?

a)

A sphere of burning gas

b)

A sphere of plasma attracted to a solid iron core

c)

A sphere of plasma held together by its own gravity undergoing nuclear fusion

d)

A very large planet that can perform nuclear fusion

2.

What causes stars to perform nuclear fusion?

a)

Random chance

b)

Extreme heat in the core

c)

Chemical reactions between gases

d)

Extreme gravitational force

3.

What is our Sun’s name?

a)

Billy

b)

Luna

c)

Sirius

d)

Sol

4.

What is a binary star system?

a)

A star system with one star

b)

A star system with only one planet

c)

A star system with two stars

d)

A star system more than 100 light-years away

5.

Which is not required for stars to form?

a)

Heat

b)

Gravity

c)

Hydrogen

d)

Millions of years

6.

What is the heaviest element that stars can fuse?

a)

Helium

b)

Oxygen

c)

Gold

d)

Iron

7.

How do low mass stars die?

a)

They cool slowly as red dwarfs

b)

They become white dwarfs

c)

They undergo a supernova

d)

They become black holes

8.

Which layer of a star do we see?

a)

Corona

b)

Photosphere

c)

Radiative zone

d)

The core

9.

Which layer of the Sun can only be seen during a total solar eclipse?

a)

Corona

b)

Photosphere

c)

Convective zone

d)

Sunspots

10.

How do high mass stars die?

a)

They become neutron stars

b)

They become blackholes

c)

They become a white dwarf

d)

They become neutron stars OR They become blackholes

11.

How do average mass stars die?

a)

They become a planetary nebula

b)

They become blackholes

c)

They become a white dwarf

d)

They become a planetary nebula with a White Dwarf at their center

12.

Which stars live the longest?

a)

High Mass Stars

b)

Low Mass Stars

c)

Average Mass Stars

d)

All stars live the same amount

13.

What part of a star is dense and hot?

a)

Corona

b)

Core

c)

Photosphere

d)

Convective Zone

14.

What part of a star is made of low-density plasma?

a)

Corona

b)

Core

c)

Photosphere

d)

Convective Zone

15.

What part of a star is where currents transport heat away from the center and toward the outer layers?

a)

Corona

b)

Core

c)

Photosphere

d)

Convective Zone

16.

What part of a star is where nuclear fusion occurs?

a)

Corona

b)

Core

c)

Photosphere

d)

Convective Zone

17.

What part of a star is where energy from nuclear fusion is radiated out from the core?

a)

Covective Zone

b)

Core

c)

Photosphere

d)

Radiative Zone

18.

What are two reasons that stars in the night sky could appear brighter than other stars?

a)

The distance of the star and the power of the star

b)

The distance of the star and the color of the star

c)

The power of the star and the size of the star

19.

Why does our sun look larger than other stars we see in the sky?

a)

it is bigger

b)

it is closer in distance

c)

it is further in distance

d)

it has a brighter color

20.
What is the name of the gas/dust clouds where all stars form?
a)
Nebulas
b)
Protostars 
c)
Supernova
d)
Neutron Star
21.
The life cycles of stars are determined by their:
a)
mass (size)
b)
color
c)
distance from Earth
d)
luminosity
22.
Most stars are made of which gases?
a)
Hydrogen only
b)
Hydrogen and Lithium
c)
Hydrogen and Sodium
d)
Hydrogen and Helium
23.
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
24.

All stars begin their life in a

a)

Main Sequence

b)

Nebula

c)

Protostar

d)

Black Dwarf

25.

The Hertzsprung-Russell diagram graphs stars' luminosity and ....

a)

color

b)

size

c)

temperature

d)

distance

26.

The Sun is a ___________ star.

a)

red giant

b)

main sequence

c)

protostar

d)

white dwarf

27.

Aldebaran is a ____________

a)

red giant

b)

white dwarf

c)

main sequence star

d)

supergiant

28.

Compared to the Sun, Spica is .......

a)

hotter and brighter

b)

cooler and brighter

c)

hotter and dimmer

d)

cooler and dimmer

29.

The process by which a star changes over its lifetime is its ____________.

a)

birth

b)

age

c)

life cycle

d)

growth

30.

Ninety percent of all stars are ______ .

a)

white dwarfs

b)

supergiants

c)

red giants

d)

main sequence stars

31.

A star with a temperature of 10,000 K and a luminosity of 5000 times greater than the Sun would be a ____________.

a)

supergiant

b)

red giant

c)

white dwarf

d)

main sequence star

32.

The ______ of a star determines its life cycle.

a)

gravity

b)

mass

c)

age

d)

color

33.

For main sequence stars, the _________ the luminosity, the ___________ the temperature.

a)

greater, lower

b)

greater, higher

c)

lower, higher

34.

How many stars are in our Solar System?

a)

Hundreds

b)

Billions

c)

One

d)

Eight

35.

A star's temperature determines its ________.

a)

size

b)

color

c)

name

d)

health

36.

White Dwarfs are ________ than the Sun.

a)

cooler

b)

dimmer

c)

brighter

d)

larger

37.

What color indicates that a star is relatively hot, compared to the others?

a)

red

b)

orange

c)

yellow

d)

blue

38.
As a whole, Giants are considered hotter than White Dwarfs.
a)
True
b)
False
39.
In the diagram given, what happens as we move to the left?
a)
Stars Get Larger
b)
Stars get Colder
c)
Stars get hotter
40.
Which star is the coldest?
a)
Yellow Star
b)
Red Star
c)
Orange Star
d)
Blue Star
41.
Compared to the rest of the stars, our sun is considered...
a)
Extremely Large and Cold
b)
Small with a medium temperature
c)
Medium size with medium temperature
42.
Which category is our Sun located in?
a)
White Dwarfs
b)
Supergiants
c)
Main Sequence
d)
Giants
43.
The category that contains the most stars is...
a)
Main Sequence
b)
Supergiants
c)
Giants
44.

Which of these observations of Barnard’s Star is most likely accurate?

a)

Barnard's star is less bright than sun and cooler

b)

Barnard's star is brighter than the sun but hotter

c)

Barnard's star is less bright than our sun but hotter

d)

Barnard's star is equal in brightness and temperature to the sun

45.
Red stars are the _____________.
a)
hottest
b)
coolest
c)
biggest
d)
brightest
46.
Blue stars are the _____________.
a)
hottest
b)
coolest
c)
smallest
47.
Look at the H-R diagram. Which star is
sort of cool, dim (not too much light), and red?
a)
Betelguse
b)
Sirius B
c)
Procyon B
d)
Barnard's star
48.
Which star has the lowest temperature?
a)
A
b)
B
c)
C
d)
D
49.
Which spectral class does our star, the sun, belong to?
a)
M
b)
K
c)
G
d)
F
50.

Which best describes stars located in area A

a)

Bright and Hot

b)

Cooler and bright

c)

Dim and hot

d)

Dim and colder

51.

Which description best describes area B

a)

Brighter and Hotter

b)

Brighter and Cooler

c)

Dimmer and cooler

d)

Dimmer and Hotter

52.

Which best describes stars in area C

a)

Brighter and Hotter

b)

Brighter an Cooler

c)

Dim and Hotter

d)

Dim and Cooler

53.

Which best describes area D?

a)

Brighter and Cooler

b)

Brighter and Hotter

c)

Dimer and Cooler

d)

Dimmer and Hotter

54.
What is the graph that shows the relations between a star's surface temperature and absolute magnitude?
a)
H-R Diagram
b)
Star Cluster Map
c)
Einstein's Diagram
d)
Newton's Chart of Stars
55.
The Hertzprung Russell Diagram consists of two axis that are labelled...
a)
Luminosity and Size
b)
Luminosity and Temperature
c)
Luminosity and Age
56.
What else does the H-R Diagram tell us besides the luminosity and temperature?
a)
Size, color and element make up
b)
Location and distance from Earth
c)
Constellation structures
57.

In Nuclear Fusion....

a)

Hydrogen is converted into Helium

b)

Protons are converted into Electrons

c)

Gas is converted into Dust

d)

White Dwarves are converted into Red Giants

58.

What is the heaviest element that can be created inside a star?

a)

Silver

b)

Iron

c)

Carbon

d)

Gold

59.

What does a star use to start nuclear fusion?

a)

Hydrogen

b)

Helium

c)

Electrons

d)

Neutrons

60.
The star that appears brightest to us on Earth is
a)
the Sun
b)
Sirius
c)
Polaris
61.

In comparison to other stars in the sky, the Sun appears brighter because it is–

a)

Bigger

b)

Smaller

c)

Nearer

d)

Further

62.
Put the stars in order from coolest to hottest.
a)
Blue, White, Yellow, Orange, Red
b)
Red, Orange, Yellow, White, Blue
c)
Red, Orange, Yellow, Blue, White
d)
Red, Yellow, Orange, White, Blue
63.
The brightness of a star as seen from Earth is its 
a)
apparent brightness.
b)
absolute brightness.
c)
parallax.
d)
reflective brightness.
64.
A very bright star can seem to be dimmer because it is 
a)
further away
b)
cooler in temperature
c)
very close
d)
batteries are dying
65.

As the _________ of a star increases, luminosity increases.

a)

size

b)

distance

c)

age

d)

composition

66.

The luminosity of a star describes its ______________.

a)

brightness

b)

temperature

c)

age

d)

color

67.
Characteristics used to classify stars include
a)
distance, size, and color.
b)
size, distance, and brightness.
c)
color, brightness, and distance.
d)
size, brightness, and temperature.
68.
The absolute brightness of a star depends on its
a)
distance and temperature.
b)
size and temperature.
c)
color and temperature.
d)
distance and color.
69.
________ nucleosynthesis happens in the center of stars and is where the elements helium through iron (Fe) are formed. 
a)
Big Bang
b)
Stellar
c)
Supernova
d)
Superdupernova
70.
All elements bigger than iron on the periodic table are formed in _________________.
a)
Big Bang Nucleosynthesis
b)
Stellar Nucleosynthesis
c)
Supernova Nucleosynthesis
d)
Genonucleosynthesis
71.

Which statement is true about the sun?

a)

It is a star

b)

It is a planet close to Earth

c)

It is the largest star

d)

It is a moon

72.

What is one thing that makes the sun different from the other stars?

a)

It is the largest star

b)

It is the farthest star

c)

It gives off the most heat energy

d)

It is the closest star to Earth

73.

Which of the following is true about the Sun?

a)

The Sun is the main source of energy for Earth.

b)

The Sun is a ball of gas.

c)

The Sun is a star.

d)

All of the above.

74.
Which layer of the sun is the hottest?
a)
Photosphere
b)
Chromosphere
c)
Corona
d)
Core
75.
What is an explosion on the sun that gives out huge amounts of energy?
a)
Sun Spot
b)
Solar Flare
c)
Sun Ray
d)
Sun Gases
76.
Label Part 3
a)
#3 Chromosphere
b)
#3 Radiation zone
c)
#3 Convection zone
d)
#3 Photosphere

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