Why is testinging results important to scintific?

If there is pressure on the inside and outside of a plastic bottle what is causing the force? What is the pivots job in a beam balance? What instrument measures hail? The belief that life is a competitive struggle in which only the fittest survive? Does ice reflect light? What is the usual medium for sound? What did Darwin do in 1831? How can we reduce the amount electricity we use at home and school? If a baseball and a cannonball are dropped from the same height at the same time which ball will hit the ground first? What is a meterical foot? What are the kinds of energy and its example? What is a practical consequences? What is a pronunciation rebus for aluminum? Sixty eight inches is how many feet? How dangerous is technetium? Do multicellular organisms develop? How many miles are 470km? What causes an object to buoy up? What happens if you rub the mineral across a streak plate but the mineral does not leave a streak? What is a person who studies the law?