6.4/6.5

Question 1

where is carbon found

Answer 1

all living things.

Question 2

What do all organisms contaiin

Answer 2

a small

amount of the isotope carbon-14.

Question 3

What does radio therapy do

Answer 3

Targets and kills cancer cells by exposing
them to high concentrations of radiation.

also damages healthy
cells.

Question 4

How are radioactive isotopes used in medicine

Answer 4

Radioactive isotopes are injected into the
bloodstream.

These radioactive isotopes collect in
organs and emit a low dose of gamma
radiation that can be detected outside the
body.

Question 5

Side effects of radiotherapy

Answer 5

hair loss

heart disease

cancers

Question 6

Different ways radioistopes are used

Answer 6

brain, bone, liver, spleen and kidney imaging

and to detect tumours

Question 7

Negative impacts of radiation

Answer 7

skin burns and acute radiation syndrome

Question 8

Unstable atoms are known as

Answer 8

radioisotopes

Question 9

the half-life of carbon-14 is used to determine the age of fossils and ancient materials through a process known a

Answer 9

carbon dating

Question 10

describe the three types of nuclear decay and their emissions.

Answer 10

Alpha decay-type of decay that occurs when the nucleus is unstable and alpha particles need to be relaesd to create balance.

Beta decay-the transmutation of a neutron into a proton and electron

Gamma decay- rays of radiation

Question 11

true or false? All radioactive substances are artificially made.

Answer 11

False

Question 12

Most of the volume in every atom is made up of

Answer 12

empty space

Question 13

What can stop gamma radiation

Answer 13

concrete or lead

Question 14

Are beta particles identical to electrons

Answer 14

yes