1. What is background radiation due to?
 
 
 
 

2. What is an alpha particle?

 
 
 
 

3. What is a beta particle?

 
 
 
 

4. What is gamma radiation?

 
 
 
 

5. Which type of radiation would be blocked by a thin sheet of paper?

 
 
 
 

6. Which type of radiation would be blocked by a thin sheet of aluminium – but not by paper?

 
 
 
 

7. Which type of radiation would be blocked by several inches of lead – but not by a thin sheet of aluminium or paper?

 
 
 
 

8. What types of radiation can be deflected by electric and magnetic fields?

 
 
 
 

9. What is the half-life of a radioactive isotope?

 
 
 
 

10. Which radiation is deflected more by electric and magnetic fields?

 
 
 
 

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