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Nuclear Fusion

Total questions: 35

Worksheet time: 34mins

Name
Class
Date
1.
In nuclear fusion, smaller atoms are forced together to create larger atoms. Does this process release, absorb or maintain energy?
a)
Absorb energy
b)
Maintain energy
c)
Release energy
2.
Do all stars make energy through fusion?
a)
Yes
b)
No
c)
Just our sun
d)
Only large stars
3.

This process, called nuclear fusion, is the energy source of all __________.

There may be more than one answer for this questions.

a)

planets

b)

suns

c)

stars

d)

plants

4.

When hydrogen is "fused" together on the Sun, what new element is created?

a)

Helium

b)

Carbon Dioxide

c)

Oxygen

d)

Light

5.
_________ happens naturally due to an unstable nucleus.
a)
fission
b)
fusion
c)
radioactive decay
d)
K-capture
6.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
decay
d)
gamma radiation
7.
Which of these statements correctly describes how the chain reaction occurs in nuclear fission.
a)
Uranium releases electrons to create   electricity
b)
When a nuclear fission reaction occurs, the electrons emitted can strike other nuclei in the sample, and cause them to split
c)
When a nuclear fission reaction occurs, the neutrons emitted can strike other nuclei in the sample, and cause them to split
d)
 Protons and neutrons change to electrons because the nuclei are so big
8.
Half life is 
a)
Fission
b)
Fusion
c)
Radioactive Decay
9.
U-235 is the primary fuel
a)
Fission
b)
Fusion
c)
Radioactive Decay
10.
What is emitted during  Alpha Radiation?
a)
A helium nuclei
b)
 An electron
c)
Gamma Rays
d)
A neutron
11.
Which type of radioactive decay gives off energy only?
a)
alpha
b)
beta
c)
gamma
12.

This is an example of...

a)

Chain reaction

b)

Fusion reaction

c)

Decomposition reaction

d)

Decay

13.
What is a chain reaction?
a)
When electrons travel are emitted causing electricity
b)
When a nuclear fission reaction occurs, the protons emitted can strike other nuclei in the sample, and cause them to split
c)
When a nuclear fission reaction occurs, the neutrons emitted can strike other nuclei in the sample, and cause them to split
d)
When a nuclear fission reaction occurs, the electrons emitted can strike other nuclei in the sample, and cause them to split
14.
Stars can take different paths due to having different _____________
a)
temperature
b)
mass
c)
brightness
d)
color
15.
All stars start as gas and dust in a(n)
a)
nebula
b)
black hole
c)
red giant
d)
black dwarf
16.
After the main sequence, a low mass star becomes a
a)
black dwarf
b)
protostar
c)
red giant
d)
supergiant
17.
After the main sequence, a high mass star becomes a
a)
black dwarf
b)
protostar
c)
red giant
d)
supergiant
18.
After a supergiant, a high mass star explodes and forms a
a)
supernova
b)
red giant
c)
black hole
d)
planetary nebula
19.
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
20.
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
21.
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
22.

The universe is EXPANDING! This means that:

a)

all of the galaxies are spreading out or MOVING APART.

b)

the universe must have started from a many points around the universe.

c)

the universe is getting HOTTER

d)

all of the above.

23.

Galaxies that are REDSHIFTED are:

a)

actually BLUE

b)

really NEAR earth

c)

invisible or not visible

d)

moving AWAY from us.

24.

Most distant galaxies show a RED SHIFT. This is considered EVIDENCE that the universe is ___.

a)

getting cooler

b)

expanding

c)

condensing into a small point

d)

swirling around

25.

A galaxy showing BLUE SHIFT is ___.

a)

very cold

b)

moving TOWARDS OR TO us

c)

dying

d)

about to supernova

26.

The CMB (Cosmic Background Radiation) is:

a)

the remaining energy from the big bang.

b)

incredibly cool.

c)

a cloud of light

d)

only located in certain places in the universe.

27.

The universe is ____________ years old.

a)

4.6 billion

b)

13.8 billion

c)

1.83 billion

d)

13.8 million

28.
a)

Leonard

b)

Sheldon

c)

Raj

d)

Howard

29.
a)

Leonard

b)

Howard

c)

Raj

d)

Sheldon

30.
Why is the abundance of H/He throughout galaxies an important piece of evidence supporting the Big Bang?
a)
H/He were two of the first elements to form following the Big Bang.
b)
H/He are highly reactive generating hot spots.
c)
H/He are high mass elements formed from supernovae.
d)
All the above
31.

If a star is being observed from Earth and it's light has shifted towards the red side of the electromagnetic spectrum it would be...

a)

Moving towards the Earth

b)

Moving away from the Earth

c)

This is a trick question that cannot be answered

d)

It isn't a star, it is a very large blueberry.

32.

A wave with a large wavelength will have a ______ frequency and _____ energy

a)

high, low

b)

high, high

c)

low, high

d)

low, low

33.

What color has the shortest wavelength, or the highest frequency?

a)

yellow

b)

blue

c)

red

d)

violet

34.

An instrument that separates light into colors and makes an image of the resulting spectrum.

a)

luminosity

b)

frequency

c)

spectrograph

d)

electromagnetic spectrum

35.
A lab sample of gas is shown at the top. Which of these would be present in the sample?
a)
Beryllium
b)
Manganese
c)
Strontium
d)
Titanium

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