Radiation

Question 1

contamination and irradiation

strawberries

Answer 1

contamination means the presence of radioactive material inside of the human body
irradiation is the process of exposing the strawberries to radiation

Question 2

explain why the hazard due to radiation is low when eating irradiated strawberries

Answer 2

the radiation passes through the strawberry, it does
not stay inside it,
so you are not ingesting any radioactive
material

Question 3

what is a beta particle

Answer 3

a highspeed/fast moving electron

Question 4

when is a bar chart used

Answer 4

for data that is categoric/not continuous

Question 5

(explain why the presence of radioactive material on the grass produces a hazard for sheep)

Answer 5

sheep (eat the grass and) become contaminated

the radioactive material inside them decays/emits radiation/could cause cancers

Question 6

describe why throwing a dice is a good way of modelling radioactive material decaying

Answer 6

radioactive decay is a random process

as is throwing a die

Question 7

which radiation have no charge?

Answer 7

gamma

neutron

Question 8

gamma radiation is the only one that is not a

Answer 8

PARTICLE

Question 9

explain why an alpha source decays into a different element

Answer 9

proton number changes

every element has a different number of protons

Question 10

explain why the smoke detector needs to produce alpha radiation and not beta or gamma

Answer 10

beta and gamma radiation would not be stopped by the smoke

but alpha particles are

Question 11

contamination

Answer 11

when atoms of a radioactive substance are ON/ in an object

can be very difficult to remove

Question 12

irradiation

Answer 12

when an object is exposed to nuclear radiation