Radioactivity

Question 1

Background

Answer 1

Caused by substances on Earth

Radiation from space cosmic rays

Living things

Human activity

Question 2

Ionisation

Answer 2

Bashing into atoms and knocking electrons off

Question 3

Detect ionising radiation using

Answer 3

Photographic film or a geiger-muller detector

Question 4

Uses of nuclear radiation medical tracers

Answer 4

Medical tracers radiation injected in patients detected externally radiographer news detector or snapshot of its distribution

on screen display shows where radiation is coming from used to check the organs of the body work good

Short half-life

Question 5

Gamma radiation used in industrial tracers

Answer 5

Squirtle gamma source in pipe flow along crack in pipe extra radioactivity at that point short half-life

Question 6

Radioactive dating of rocks and archaeological specimens

Answer 6

Measure amount of radioactive isotope left in sample knowing it’s half life you can work out how long the thing has been around by comparing how much of the radioactive source and stable isotopes are in the thing

Question 7

moderator is

Answer 7

Graphite

Question 8

Control rods

Answer 8

Boron

Question 9

Gas typically carbon dioxide

Answer 9

Pumped through reacting to carry away heat

Question 10

Heat exchanger

Answer 10

Gas CO2 pumped through heat exchanger gives energy to water