iGCSE double award Radioactivity (Physics) 0.0 / 5 ? PhysicsRadioactivityIGCSEEdexcel Created by: lottiethomas789Created on: 10-03-16 20:09 If radioactive waste is put into water, what will happen? It will poison ecosystems 1 of 22 Where is radioactive waste deposited? Buried underground 2 of 22 What is a medical risk of exposure to too much radiation? Cancer (caused by mutations) 3 of 22 What is the purpose of radiotherapy? To kill cancerous cells 4 of 22 What is a tracer? A radioactive source which is put into a system to detect blockages 5 of 22 What is radioactive dating? Where a radioactive object is measured against the half life of carbon 6 of 22 What is meant by the term 'half-life' The time taken for radiation emitted by a source, to decrease by a half 7 of 22 What is radiation measured in? Bequerels 8 of 22 What is radioactive dating used for? Used by archaeologists to see how old something is 9 of 22 How will a radioactive source vary with time? It will decrease over time 10 of 22 What does a geiger-muller device do? It beeps in the presence of radiation. The more radiation, the more frequent the beeps 11 of 22 What is the most common source of background radiation? Radon gas from the ground 12 of 22 What is gamma radiation? An electromagnetic wave 13 of 22 What is beta radiation? A high speed electron 14 of 22 How is the penetrating power of an alpha particle reduced? With paper or air 15 of 22 What is alpha radiation? A helium nucleus 16 of 22 How is the penetrating power of a beta particle reduced? With 3mm of aluminium 17 of 22 How is the penetrating power of a gamma particle reduced? With a thick layer of lead 18 of 22 What is the order of ionisation power from lowest to highest? Gamma, Beta, Alpha 19 of 22 What is the effect on the mass + atomic number on gamma on the nucleus? No specific effect 20 of 22 What is the effect on the mass + atomic number on alpha on the nucleus? Atomic number goes down by 2 21 of 22 What is the effect on the mass + atomic number on beta on the nucleus? Atomic number increases by 1 22 of 22
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