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Name______________________________________ Date____________________ Pd_____ TEST 2: Study Guide Scientific Method 1. Draw the diagram of the scientific method. 2. What should you do after “state the problem”? 3. What should you do if your hypothesis is supported? 4. What should you do if your hypothesis is not supported? 5. What is the difference between a dependent and an independent variable? 6. Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle. a. Independent variable: b. Dependent variable: c. Control: Metric System 7. _________________ is the measurement of how much an object weighs. 8. _________________ is the measurements of how much space an object takes up. 9. _________________ is the measurement of the ratio between how much an object weights and how much space it takes up. 10. The base unit for mass is_______________ 11. The base unit for volume is________________ 12. The base unit for length is________________ 13. Prefix Unit abbreviation Exponential factor Meaning Example mega 103 100 da xxxxxxxxxx xxxxxxxxxx 100 d 1 Meter(m), liter(L), gram(g) .1 Centimeter(cm) m micro .000001 Converting Units 14) 20 mL = ________________ kL 15) 44.38µL = ______________dL 16) 0.0938 L = _______________kL 17) 2.4 µm =________________mm 18) 66mg = __________________dam 19) 77.83 g =__________________dg 20) 0.0394 Mg = ________________µg 21) 3 cm =____________________km Measuring Correctly 22. _____________ 23. _______ 25. __________ 26. 24. ______ ___________ Density 27. A rock is placed on a triple beam balance and its mass is found to be 34.8g, it is then placed in a grad cylinder containing 60.0mL of water. After placing the rock in the grad cylinder the water level was measured to be 74.0mL, what is the density of the rock? 28. A rectangular object’s side are measured to be 2.5cm, 4.0cm and 3.2cm. Its mass is measured to 31.7g. What is the density of the object? Would it float or sink in water? 29. What is the mass of an object that has a volume of 7.2mL and a density of 0.88 g/mL? Sig Figs 30) 4.0____ 31) 0.032_____ 32) 550______ 33) 0.89300_____ 34) 203 ____ 35) 2.3001____ 36) 2000_____ 37) 4500______ 38) 2300_____________ 41)2.8 x 102____________ 39) 0.0045 _____________ 42) 3.087 x 10-1____________ 40) 889___________ 43) 9.1 x 10-3_________ 44) 75.43 ___________ 3 sig figs 45) 21.3986___________ 3 sig figs 46) 23.889 _____________ 4 sig figs 47) 23945______________ 2 sig figs 48) 23.08 + 3.1 = ______________________ 49) 76 + 23.843 = ______________________ 50) 0.0030 ÷ 843 = ___________________ 51) 1.3834 x 500 = ______________________