Across
- 2. hooke English scientist who formulated the law of elasticity and proposed a wave theory of light and formulated a theory of planetary motion and proposed the inverse square law of gravitational attraction and discovered the cellular structure of cork and introduced the term cell' into biology and invented a balance spring for watches (1635-1703)
- 3. the force of attraction between all masses in the universe
- 7. method a method of investigation involving observation and theory to test scientific hypotheses
Down
- 1. having or representing the sun as the center, as in the accepted astronomical model of the solar system.
- 4. bacon English statesman and philosopher; precursor of British empiricism; advocated inductive reasoning (1561-1626)
- 5. kepler German astronomer who first stated laws of planetary motion (1571-1630)
- 6. galilei Italian astronomer and mathematician who was the first to use a telescope to study the stars; demonstrated that different weights descend at the same rate; perfected the refracting telescope that enabled him to make many discoveries (1564-1642)