Name
Class
Date
Introduction to Fission and Fusion
Fission and Nuclear Power Plants
History:
_____ and Strassman bombarded
__________ with neutrons, but the products
showed different
_____ properties that they could not explain.
Meitner and
_____ =
_____ found that instead of heavier uranium, it had
__________.
_____ into smaller
Nuclear Forces
1.
Electric repulsion –
___________ charge particles repel each other
2.
Strong nuclear force causes protons and neutrons to
•
Stable nuclei = strong nuclear force is
•
Unstable nuclei = strong nuclear force is
Considered unstable if the atoms:
o Have too many or too few
o Have more than
o Will
3.
____________ each other
____________ than repulsion force
___________ than repulsion force.
______________ in the nucleus (an
________!)
protons in nucleus
________________ into a more stable nucleus
Define fission:
Nuclear Chain Reactions
•
Nuclear fission releases more
reactions
•
The number of
________ which trigger more
___________
_____________ released determines the success of a chain reaction
How did the mousetrap video show a chain reaction?
Applications of Controlling Chain Reactions
1.
Atomic Bomb (fission bomb) – triggering a chain reaction in
•
2.
__________ or 239Pu
Must have a minimum amount of radioactive isotope to sustain a chain reaction =
__________
Nuclear power plants – Convert heat energy from fission chain reaction into
•
Control chain reaction with
fission reaction.
_______ that absorb
____.
_______ emitted after
Nuclear Energy Powerpoint
1.
Nuclear energy powers
3/24/16 10:39 AM
in
U.S. homes and businesses.
1 of 2
Oelfke (elf-ka)
2.
In the nuclear power plant, heat produces steam, which generates
_______.
3.
List two safety designs engineered into a nuclear power plant to help prevent explosions.
Nuclear Reaction Video Questions
1.
In what year was nuclear power first used to generate electricity?
2.
What is the principle element used in nuclear power plants?
Nuclear Power Plant Benefits
•
Do not release
_______ like
fueled by
_______.
•
Much
plants.
___ efficient in producing power because it uses less
__ than power
•
A very
___ pellet of uranium releases
ton of coal.
______ into the atmosphere like power plants
__ energy than
Fusion and The Sun
Define fusion.
A large amount of
_________ is required to start a fusion reaction
o Need this energy to overcome
o Extremely high
__ forces of protons.
____________ can provide start-up energy.
______ energy in fusing hydrogen than
________ of uranium
Where in the universe is there enough extreme heat needed for fusion to occur?
• Fusion of
________ into
______ in the Sun’s core generates the Sun’s energy.
How long ago did fusion generate the energy we now receive as sunlight? Fusion created the energy
we receive today about a
______ years ago. This is the time it takes for photons and then
convection to transport energy through the Sun’s core to the
______________. Once sunlight
emerges from the photosphere, it takes only about
minutes to reach Earth.
Fusion Energy Advances Video Questions
1.
When creating energy by fusion, there is no
2.
Fusion is the opposite of
3.
A challenge of producing fusion reactions is that the lasers are
_____ very frequently.
3/24/16 10:39 AM
__________ waste.
_______.
2 of 2
____________ and cannot
Oelfke (elf-ka)