In which time period did ancient greek philosophers propose that all matter was composed of four fundamental substances: earth, air, water, and wind? 8000 b. c. – 1000 b. c. 1000 b. c. – 450 b. c. 300 b. c. – 1400 a. d. 1774 – 1794 a. d. time period 1 time period 2 time period 3 time period 4 time period 1 time period 2 time period 3 time period 4

  Time Period 2 1000 B.C. - 450 B.C.

Explanation:

  It was originated by the Greek philosopher Empedocles. He was a Greek pre-Socratic philosopher considered as the last one to have recorded his ideas in verse.

  He is known for originating the cosmogonic theory of the four classical elements. He called them the four "roots".

  I hope this answer helps you.

heat or electricity in the atmosphere- c.