Why is carbon used for dating fossils?
It has a large number of isotopes
It has a small number of isotopes
Living things are made from it
Which ratio is used to date rocks?
Uranium to lead
Uranium to gold
Uranium to thorium
As rocks become older what happens to the proportion of lead?
It stays the same
It decreases
It increases
What is the name given when ionising radiation is used to treat cancer?
Chemotherapy
Radiotherapy
Tracers
Cancers are formed when radiation collides with which part of a cell?
RNA
DNA
Mitochondria
Which is the most dangerous type of radiation inside our bodies?
Gamma
Beta
Alpha
Which are the most dangerous types of radiation outside our bodies?
Gamma and beta
Beta and alpha
Alpha alone
What type of radioactive waste is mixed with concrete and put in a stainless steel drum in a purpose-built store?
High
Intermediate
Low
Which scientist or scientists actually tested the plum pudding model?
Geiger and Marsden
Rutherford
Darwin
What is released when a neutron hits a uranium nucleus in nuclear fission?
Daughter nuclei and two or three further neutrons
Daughter nuclei and one neutron
Daughter nuclei and two or three further electrons