Topic 6

Question 1

background radiation comes from

Answer 1

all things like air food and rocks

Question 2

radiation from space is

Answer 2

cosmic rays from sun

Question 3

tiny part of background radiation is

Answer 3

from human activity

Question 4

the level of background radiation changes

Answer 4

depending whether you are

Question 5

radon concentration depends widely on

Answer 5

the type of rock

Question 6

radioactivity of a sources always

Answer 6

decreases over time

Question 7

half-time of a radioactive isotope is the time take for

Answer 7

half of the undecayed nuclei decay

Question 8

calculating half life

Answer 8

divide by twwo

Question 9

half life can be shown on

Answer 9

graph

Question 10

you can use models to simulate

Answer 10

radioactive decay

Question 11

house hold fire alarms use

Answer 11

alpha radiation

Question 12

sterilisation of food and equipment uses

Answer 12

gamma rays

Question 13

radiation is used in

Answer 13

tracers and thickness gauges

Question 14

gamma rays can be used to

Answer 14

treat cancer

Question 15

ionising radiation can cause

Answer 15

tissue damage and cell mutation

Question 16

how to protect yourself in laboratory

Answer 16

never allow skin contanct, keep source at arms length, keep source pointing away from body, put source back in labelled lead box

Question 17

wear

Answer 17

lead lined suits, lead barriers and lead screens

Question 18

nuclear…… is a big problem for the nuclear industry

Answer 18

waste

Question 19

fission creates waste products that

Answer 19

cant just be thrown away

Question 20

vitrification is

Answer 20

melting waste with other waste to make glass and it sealed in steel containers and buried under ground

Question 21

nuclear power has a negative

Answer 21

public perception

Question 22

chernobyl is a good

Answer 22

example of it going wrong

Question 23

nuclear power doesnt release

Answer 23

fossil fuels gases

Question 24

cost is high for

Answer 24

nuclear