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- 4. AUTHOR AND ADVOCATE FOR WILDERNESS
- 7. SUBSTANCE WIT CONSTANT COMPOSITION
- 10. ENERGY THAT RESULTS FROM ELECTRIC CHARGE
- 11. NATURAL OBJECTS AND PHENOMENA
- 13. QUANTITY OF MATTER
- 15. A CONSERVED QUANTITY
- 18. STABLE AND UNREACTIVE
- 19. EXPLORE HUMAN SOCIETY
- 22. ENERGY OF ELECTROMAGNETIC WAVES
- 24. IONIC COMPOUND OF CATIONS AND ANIONS
- 26. CONCERNED WITH LIVING THINGS
- 27. SUBSTANCE THAT PRODUCE OH- WHEN DISSOLVED IN WATER
- 28. ENERGY THAT COMES FROM HEATED SUBSTANCE
- 29. FALL BETWEEN METAL AND NON METAL
- 30. TYPE OF ENERGY THAT DEALS WITH MOTION OF OBJECT
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- 1. SUBSTANCE THAT CONTAIN TOW OR MORE ELEMENTS
- 2. ENERGY STORED IN BONDS OF CHEMICAL COMPOUND
- 3. HAS MASS AND SPACE
- 5. CONDUCT ELECTRICITY AND HEAT
- 6. PROVED POLLUTED WATER CAUSES CHOLERA
- 8. SUBSTANCE THAT CANNOT BE SEPARATED
- 9. STUDY OF INTERACTIONS BETWEEN LIFE AND PHYSICAL ENVIRONMENT
- 12. BIOLOGIST, AUTHOR OF BOOK THAT ANIMATED ENVIRONMENTAL AWAKENING
- 14. PREDICTABLE BEHAVIOR AROUND US
- 16. ENERGY IN THE NUCLEUS OF AN ATOM
- 17. GRAVITATIONAL FORCE OF ATTRACTION EXERTED BY EARTH ON A BODY
- 20. DO NOT CONDUCT ELECTRICITY AND HEAT
- 21. SMALLEST UNITS OF MATTER
- 23. SUBSTANCE THAT YIELDS H+ OR H3O WHEN DISSOLVE IN WATER
- 25. STUDIED THE DANGEROUS TRADE