Nuclear reactions
Name: ______________________ Date: ____________
Write the letter of the matching definition next to each term.
1. uranium
A. A heavy toxic silvery-white radioactive metallic element
2. plutonium
B. Twinkling lights in the night sky
3. neutrons
C. A fourth state of matter distinct from solid or liquid or gas and present in stars and fusion
4. fusion
D. Reproduction of some unicellular organisms by division of the cell into two more or less equal parts
5. fission
E. Exhibiting or caused by ___
6. helium
F. A nuclear weapon in which enormous energy is released by nuclear fission
7. stars
G. Any of several kinds of apparatus that maintain and control a nuclear ___ for the production
8. decay
H. A farm building for housing horses or other livestock
9. halflife
I. The organic phenomenon of rotting
10. radioactivity
J. The power to do work or make things move
11. plasma
K. A solid silvery grey radioactive transuranic element whose atoms can be split when bombarded
12. energy
L. A very light colorless element that is one of the six inert gasses
13. reactor
M. The state of being combined into one body
14. atomic bomb
N. The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
15. stable
O. An uninhabited wilderness that is worthless for cultivation
16. radioactive
P. An elementary particle with 0 charge and mass about equal to a proton (plural)
17. waste
Q. The time required for something to fall to ___ its initial value