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Radioactivity Test

Radioactivity Test Review

QuestionAnswer
What 2 elements did Henri Bequerel work with? uranium & film
What two elements did the Curies discover? radium & polonium
Who is the “father of radioactivity”? Ernest Rutherford
What theory did Albert Einstein come up with? E = mc2 E = energy, m = mass, c2 = constant (speed of light)2
What type of nuclear reaction takes place in nuclear reactors and bombs and is people-controlled? fission
Why doesn’t fusion happen on earth? can’t create enough heat
What are 3 ways to detect radiation? Geiger counter, film badge, cloud chamber
In nuclear fission, which particle splits the atom & causes a chain reaction? neutron
When uranium undergoes fission, what two atoms are produced? barium & krypton
What fuel is used by the U.S. nuclear reactors? U-235
Where do we dispose of nuclear waste? deep underground
What is considered low-level radioactive waste? clothing, shoes, machinery
What are problems with nuclear reactors? radiation, waste, possible meltdown
Name some natural sources of radiation rocks, body, buildings, bread, fruit, Brazil nuts,
What is radioactive decay? where an element gives off radiation & changes to new element
What is an isotope? same element but w/ different number of neutrons
What do control rods do? absorb neutrons
What are characteristics of Gamma Rays? Dangerous, fastest, neutral, X-rays
What are characteristics of Beta Particles? faster, Helium nucleus, negative, stopped by 2 sheets paper
What are characteristics of Alpha Particles? slowest, positive, stopped by skin or paper
Nuclear fission & fusion use lots of … Energy!
Boiling water is a chemical or physical change? Physical change
Leaves rotting is a chemical or physical change? chemical change
Iodine 131 is used to treat thyroid problems
Carbon-14 is used to measure age of ancient objects
Created by: deleted user
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