Hannah Damaske - Ch. 10 Crossword

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Across
  1. 4. a mass large enough to sustain fission
  2. 6. a self sustaining reaction in which the products of one reaction event stimulate further reaction events
  3. 7. type of radiation that carries a positive electric charge
  4. 8. discovered that mass is congealed energy
  5. 10. time required for half of an original quantity of an element to decay
Down
  1. 1. type of radiation that carries a negative electric charge
  2. 2. radiation is more intense at ______ altitudes
  3. 3. form of radiometric dating used for plants and animals
  4. 5. results from radioactive decay
  5. 9. type of radiation that carries no charge