I.M.S. SCIENCE                                   Name: __________________________

    PRE-Assessment Radiation:              Period: ______ Date:`___________     SCORE:____   / 18

A. Neutron              G. radioactivity  M. containment   

B. electron             H. alpha          N. low-level radioactive waste

C. nucleus             I. compound       O. shielding

D. proton               J. formula        P. millirem

E. mass number          K. gamma          Q. half-life

F. atomic number        L. beta           R. high-level radioactive waste    

the number of protons in the nucleus of an atom                   1.  _____

a substance made up of two or more elements                       2.  _____

the release of energy from the nucleus of an atom                 3.  _____

the central part of the atom; it has a positive charge            4.  _____

the number of protons plus number of neutrons in an atom          5.  _____

type of radiation made up of positively charged particles         6.  _____

unit of measurement in radiation                                  7.  _____

positively charged particle in the nucleus of an atom             8.  _____

type of radiation made up of negatively charged particles         9.  _____

a negatively charged particle near the nucleus of an atom         10. _____

a particle with no charge in the nucleus of an atom               11. _____

wave of energy: type of radiation                                 12. _____

used to indicate quantities and specific elements which

make up a compound                                                13. _____

an example is used fuel rods from commercial nuclear

power plant reactors                                              14. _____

by-product of processes that use radioactive materials;

most have a relatively short half-life                            15. _____

barriers to radiation                                             16. _____

restriction of radioactive materials from entering

the environment                                                   17. _____

time it takes for a material to lose half of its radioactivity    18. _____