# Hw Chap 1-6

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CHAPTER 1 1.3 the Scientific Method-A Classic Tool 3. Specifically, what do we mean when we say that a scientific hypothesis must be testable? For a Hypothesis to be considered scientific it must be testable –it must, in principle, be capable of being proven wrong. 1.5. The Scientific Experiment 5. How did Galileo disprove Aristotle’s idea that heavy objects fall faster that light objects? Galileo showed the falseness of Aristotle’s claim with a single experiment –dropping heavy and light objects fell equal speeds. 1.6 Facts, Theories, and Laws 6. Distinguish among a scientific fact, a hypothesis, a law and a theory. A Scientific fact is something that competent observers can observe and agree to be true. A Hypothesis is and educated guess or a reasonable explanation. A law is scientific hypothesis that has been tested over and over again and has not been contradicted. Also known as a principle. A theory is a synthesis of facts and well tested Hypothesis about certain aspects of the natural world. 1.11 Integrated Science 14. Why study integrated science? Studying integrated science allows us to understand the physical world – to appreciate it more deeply or to have the power to alter it- requires concepts from different branches of science. CHAPTER 2 2.61 Indicate if each of the following is answered with exact number or a measured number. a. Number of legs: exact b. Height of table: measured c. Number of chairs at the table: exact d. Area of tabletop: measured 2.63 measure the length and width of the rectangle using a metric ruler. a. What is the length and width of this rectangle measured in centimeters? Length= 6.96 cm, width = 4.75 cm b. What is the length and width of this rectangle measured in millimeters? Length= 69.6 mm, width = 47.5 mm c. How many significant figures are in the length measurement? 3 significant