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24 Cards in this Set
- Front
- Back
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What can be used to bombard a stable nucleus with a particle, such as an aplha particle or a neutron, to produce isoptopes that do not occur naturally on earth.
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accelerators
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What process produces isotopes that do not naturally occur on earth.
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Artificial Radioactivity.
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Radiation can affect humans by:
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interacting with the DNA in cells.
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Our cells repair most of the damgae from low-level background radiation. But what can cause irreparable damage to us?
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Short bursts of intense radiation.
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During nucleur reactions, large amounts of what are released?
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energy
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During nucleaur reactions, energy comes from _________ that is transformed into ______.
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nucleaur mass, energy
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E=mc2 shows?
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the conversion of mass into energy.
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What is nucleaur fission?
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it occurs when a large nucleaus splits into 2 smaller nuclei.
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the process of nucleaur fission usually produces?
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some individual neutrons along with 2 smaller nuclei.
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The total mass of the products produced by nuclear fission is smaller than what?
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the original mass
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Nucleaur reactions convert some mass into ?
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energy
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Because of their high energy yield, nuclear fission rections were used like weapons in what war?
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World War II
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What is a control rod?
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A material that absorbs neutrons.
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What is a moderator?
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a material that slows neutrons.
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Chain reaction
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a reaction that initiates its own repetition
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What were the problems that fermi's team encountered when building a nuclear fiision reactor?
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1. what materials to use
2. uranium doesn't abosorb fast neutrons 3. neutrons escape. not enough uranium fuel 4. controlling fission reaction 5. large amounts of heat & energy during reaction |
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What were the solution that fermi's team created when building a nuclear fiision reactor?
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1. material: uranium 235 atoms
2. Absorb neutrons: graphite [form of carbo] 3. Escaping Neutrons: keep adding fuel 4. Controlling reaction: rods inserted near the U-235 5. Too much energy and heat: coolant converts to electricity. |
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List four advantages of nucleaur power.
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1. doesn't produce air pollution.
2. requires inexpensive fuel 3.large amounts of energy in a single plant 4. fuel is easy to transport |
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List 2 major disadvantages of nuclear power.
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1. reuires large, expensive containment and waste storage facilities.
2. Produces radioactive waste which requires long-term storage. |
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What is nuclear fussion?
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the fusing or joining of 2 small nuclei to make one larger nucleus.
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Where does the simplest form of fusion occur?
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In the sun. H + H = He
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True or false. When 2 nuclei fuse into a single nucleus, a small amount of mass is converted into an enormous amount of energy.
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true
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Nucleaur fission in stars produces all of the what?
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All of the elements in the periodic table.
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You can do this rachel!! Rock this test. You can so ace it. Your halfway done physics and you've done most of earthscience. you've done all of bio!!
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YOU WILL ACE THIS. DONT THINK OTHERWISE!
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