Crossword Puzzle

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Across
  1. 3. / A branch of mathematics that uses symbols or letters to represent variables, values or numbers, which can then be used to express operations and relationships and to solve equations
  2. 5. / Scale of temperature
  3. 9. / The scientific study of plants
  4. 10. da Vinci / Painted "The Last Supper" and the "Mona Lisa"
  5. 12. / It is a country consist of 7,107 islands
  6. 14. Aguinaldo / First president of Philippines
  7. 16. Marcos / President of the Philippines from 1965 to 1986
  8. 18. Duterte / 16th and current President of the Philippines
  9. 19. / was an Italian Renaissance sculptor from Florence
Down
  1. 1. / The solid surface layer of a planet or moon
  2. 2. / The scientific study of rocks
  3. 3. / World's largest continent
  4. 4. / Painted "The School of Athens"
  5. 6. / Layer of gases surrounding a star or planet
  6. 7. / Study of the space beyond the Earth and of its contents
  7. 8. / The central region of a star, planet or galaxy
  8. 11. / Painted "The Sistine Chapel ceiling"
  9. 13. Bonifacio / The Father of the Philippine Revolution
  10. 15. / Father of Biology
  11. 17. / The study of living organisms