4.3

Question 1

Geiger counter used for?

what does it detect?

Answer 1

used to measure radiation

detects beta and gamma radiation

Question 2

how does a geiger counter detect?

Answer 2

using ions produced by radiation to create an electrical current

Question 3

Units of radiation (metric and SI)

Answer 3

curie (becquerel)
rad (Gray)
rem (sievert)

Question 4

curie (Ci)

what does it measure?

Answer 4

measures (radio)activity/disintegration using

decay in 1sec/1gram of radium

Question 5

rad (radiation absorbed dose)

what does it measure?

Answer 5

measures radiation absorbed by tissues of the body

Question 6

rem (radiation equivalent)

what does it measure?

Answer 6

measures biological damage from different types of radiation.

Question 7

becquerel (Bq)

SI unit of? precise measurements?

Answer 7

SI unit of curie,

measures 1 disintegration per second

Question 8

gray (Gy)

SI unit of? precise measurements?

Answer 8

SI unit of rad,

joules of energy absorbed by 1 kg of body tissue

Question 9

sievert (Sv)

SI unit of?

Answer 9

SI unit of rem,

Question 10

1 Ci= __Bq

Answer 10

1 Ci= 3.7 x 10^10Bq

Question 11

1 Gy=__rad

Answer 11

1 Gy= 100 rad

Question 12

1 Sv=__rem

Answer 12

1 Sv= 100 rem

Question 13

formula to calculate biological damage?

Answer 13

biological damage (rem)= absorbed dose(rads) x factor

Question 14

Gamma ray and Beta particle: factor

Answer 14

1

Question 15

alpha particle: factor

Answer 15

20

Question 16

high energy protons and neutrons: factor

Answer 16

10

Question 17

where do you get exposure to radiation?

Answer 17

medical/dental procedures
air travel, radon, cigarettes
naturally occurring isotopes (potassium-40)

Question 18

How much radiation would be considered undetected?

Answer 18

25 rem

Question 19

What happens to a body that is exposed to 1 Sv (100 rem) of radiation?

Answer 19

temporary decrease in white blood cells

Question 20

what happens to a body that is exposed to more than 1 Sv (100 rem) of radiation?

Answer 20

radiation sickness

Question 21

what happens to a body that is exposed to 5 Sv (500 rem) or more of radiation?

Answer 21

death in 50% of population

Question 22

LD50

Answer 22

lethal dose to one-half of the population

Question 23

does every life form have the same LD50?

Answer 23

No

Question 24

how much whole body radiation would be fatal to humans?

Answer 24

6 Sv or greater