My crossword: Guilherme info141

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Across
  1. 4. Prefix meaning self + personal signature of someone famous or notable.
  2. 7. Prefix meaning large + device used to amplify sound
  3. 8. Prefix meaning above + large retail store selling food and household items
  4. 9. Prefix meaning excessive + having an unusually high level of energy or activity
  5. 10. Suffix meaning study of + science of living things
Down
  1. 1. Prefix meaning before + relating to ancient times
  2. 2. Prefix meaning not enough + to value something too low
  3. 3. Prefix meaning above + fictional character with extraordinary abilities
  4. 5. Prefix meaning out + to breathe out air
  5. 6. Prefix meaning bad + to fail to work properly