2. The description, understanding, and prediction of physical phenomenon through the use and generation of verifiable theories, laws, and principles.

3. The use of scientific knowledge and/or empirical knowledge how for the production, improvement, and distribution of goods and services,as well as the satisfaction of other material needs.

4. What can be considered as the topmost priority of many countries in these modern times?

5. The basic tool used by scientists in the search for knowledge.

6. Study of past occurrences.

7. The founder of the Academy of Athens.

8. The founder of the Lyceum of Athens.

9. Discovered x-ray in 1895.

10. French, chemist, founder of microbiology, known primarily, for his work on pasteurization of food and on preventive vaccines.

11. His ability to run on cheap, unrefined oil, the engine became widely used in industry and transport.

12. Received radio signal over Atlantic in 1901.

13. Brothers flew the first motorized plane in 1903.

14. Creates controlled nuclear reaction in 1942

15. The inventors of the wheel.

16. An alloy of copper and tin.

17. Power source during the industrial revolution.

18. The builders of the aqueduct and colosseum.

19. Geographical discoveries and printing were the two major developments of this period.

20. Known as the Paleolithic Period.

21. Marked the period of development of technology when the working of iron came into general use.

22. Marked the beginning of the age of modern factory.

24. Biggest continent of the world and the home of many civilizations.

24. A scientist whose life was changed when one of his professors recommended him to join a five-year voyage through the HMS Beagle on the islands of Galapagos.

25. Published his book origin of species in 1589 and is considered to be one of the most important scientific work.

26. His ideas were an example of what is presently called as a thought experiment.

27. Famous figure in the field of psychology and his method of psychoanalysis is a scientific way to study the human mind and neurotic illness.

28. Mandatory Education

29. Built hydraulics system with sophisticated waterways to supply water to different communities.

30. Chinampa

31. The first suspension bridge.

32. Roads paved with stones.

33. Built looms for weaving cloth and devised a rainbow of glittery paints made from mineral mica.

34. Known for manufacturing iron and in metallurgical works.

35. A system of traditional medicine that originated in ancient India.

36. A system of knotted ropes to keep records that only experts can interpret.

37. They invented tools like iron plough, wheelbarrow, propeller, and among others.

38. Gave his name to the concept of the algorithm while the term algebra is derived from al-jabr.

39. Pioneered the science of experimental medicine and was the first physician to conduct clinical trials.

40. The Golden Age of Islam lasted until____________.

41. Blessed with natural and mineral resources.

42. Start of the first industrial revolution.

43. Rapid spread of knowledge and information.

44. Age of machine tools and revolutionized travelling.

45. Identify the tool/invention above.

47.

48.

49. He made a number of observations that finally helped convince

people that the Sun-centered solar system model (the heliocentric model), as

proposed by Copernicus, was correct.

50. He was an American astronomer who, in 1925, was the first to

demonstrate the existence of other galaxies besides the Milky Way, profoundly

changing the way we look at the universe.