End Of Topic Test

Question 1

Sources of background radiation

Answer 1

Cosmic rays from space

Natural radiation in rocks

Question 2

Why are alpha particles used in Smoke alarms

Answer 2

Because they are very ionising and produce ions which are charged

Smoke blocks the detecter from alpha particles

Alpha cannot reach detector and smoke alarms

Question 3

Mass of gamma

Answer 3

0

Question 4

Relative charge of alpha

Answer 4

2+

Question 5

Alpha absorbed by

Answer 5

A thin sheet of paper

Question 6

Beta absorbed by

Answer 6

Approx 5 mm of aluminium

Question 7

Gamma absorbed by

Answer 7

Thick lead

Question 8

Alpha ionisation in air

Answer 8

Strong

Question 9

Beta ionisation in air

Answer 9

Medium

Question 10

Gamma ionisation in air

Answer 10

Weak

Question 11

Alpha range in air/penetration

Answer 11

Fixed range of the order of a few cm for a given source

Question 12

Beta range in air/penetration

Answer 12

Varies up to a metre or so in air

Question 13

Gamma range in air/penetration

Answer 13

Gradually decreases as distance increases

Question 14

First question

Answer 14

Beta because alpha can’t go through skin and Bcuz gamma is too penetrating

Question 15

What is an isotope

Answer 15

Atoms of elements that have the same number of protons but a different number of neutrons

Question 16

What can radiation cause (first one)

Answer 16

Cause mutations in living organisms, which can result in cancer

Can damage cells and tissue

Question 17

Why is having a job in radiation bad for ur health

Answer 17

Gives u cancer

Piolets- cosmic radiation
doctor- x rays,

Question 18

background radiation, why is it not constant?

Answer 18

Because it’s random

Question 19

What can u use to detect alpha radiation?

Answer 19

Geiger muller detecter