1. Find equivalents. 

2. False or true? 

1. The work of the Italian astronomer Galileo Galilei revolutionized the world science.

2. It was he who proved that the Earth and other planets revolve around the sun.

3. Church entirely confirmed his finding.

4. He discovered that the Earth as well as the sun was the centre of the universe.

5. He discovered that gravity is the rate at which an object falls irrespectively to its weight.

3. Find synonyms: 

vary, solid, speed, orbit, type, humanity, estimate, later, imprecise, complete, destroy, indicate, mankind, realize, still, round body, discovery, differ, main, enormous, cause, rate, have an idea, damage, finish, revolve, show, inaccurate, globe, quiet, eventually, calculate, very big, kind, reason, finding, hard, key.

4. Find antonyms: 

still, vapour, slow down, begin, peaceful, condense, light, quick, speed up, far, complete, destructive, heavy, near.

5. Do Quizes 1, 2.