28) John Kepler was an .... astronomer

29) The term Renaissance was first used by the Italian artist and critic ....in his book ′The Lives of the Artists′

30) The Renaissance was first defined by .....historian Jules Michelet (1798-?1874), in his work, ′Histoire de France′.

31) Who wrote the book ′The Waning of the Middle Ages′?

32) Who was credited with discovering ′the law of gravitation′.