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WorksheetsBackground radiation
Total questions: 10
Worksheet time: 5mins
Which of these is the most suitable description of background radiation
a measure of the level of ionizing radiation present in the environment at a particular location
a measure of how much radiation you absorb
a measure of radiation that comes from space only
a measure of radiation that comes from the buildings
Which gas is the most common source of background radiation
Radium
Radio
Radon
Rubidium
A student measures the background count three times and gets these readings 20, 23 and 26 counts per second. Which of these is the correct average count?
3
22
23
51
Which of these best describes why radon is a dangerous radioactive gas
it can be breathed in and out
it can be breathed in and it can mutate DNA
it mutates all cells
It can be breathed in and it can go the the brain
which answer best states the two methods of detecting radiation
Geiger counter and a camera
Geiger counter and photographic film
A GM tube and a camera
GM tube and photographic film
After Radon, which of these is the biggest source of background radiation?
Buildings and ground
Nuclear power stations
Water
The sun
A sample of rock gives a count per second of 280. Why is this not a correct measure of the radioactivity of the rock
it is too high for any rock
It also includes the cosmic rays
it also contains the background count
they have removed the background count
Explain how to adjust the count to give the correct count of a radioactive sample
add the background count to the sample count
multiply the sample count by the background count
divide the sample count by the background count
subtract the background count from the sample count
A sample of a radioactive rock gives a count of 138. If the average background count is 27, calculate the count rate of the sample
165
3726
5
111
All radiation is harmful to life. Is this statement true or false?
true
false
