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Culver City H.S. Chemistry [Keep for Reference] 1,2 Chemistry Fundamentals How Can I State A Research Question? I can… S T U D Y L I S T How Can I Show That My Calculations Are Correct? Identify the independent variable, dependent variable and controlled variable in a research situation. Craft a well-written research question that clearly states the independent and dependent variables. Design a simple experiment to explore a research question such as “How does the number of Mentos tablets affect the height of a diet soda geyser?” How Are Measurements Different from Regular Numbers? Recognize the difference between accuracy (how close measurements are to a “true” value) and precision (how close measurements are to each other). Measure length, mass, and volume with the correct precision. Round off long numbers to a specified decimal place. Write very large or very small numbers in scientific notation. Analyze class data to indicate accuracy using % error. (Know the formula.) Write equalities as conversions factors. 1 mile [ex., ] 5280 feet Use “dimensional analysis” to set up problems that convert one unit to another. Calculate answers from a dimensional analysis set up. Use time facts and metric facts in dimensional analysis problems. Identify the Given Value and Desired Unit in a dimensional analysis problem. List the three metric prefixes (centi-, milli-, and kilo-) as conversion factors for Liters (volume), meters (length), and grams (mass). Enter numbers written in scientific notation into a scientific calculator. Why Is Density A Useful Property of Matter? Define density as mass/volume. Calculate density from measurement data. Calculate density from a graph of measurements. Analyze class data to indicate precision using notation or significant figures. (Know the formula.) How Can I Organize My Data? Define significant figures as all those of which you are certain plus one more that involves judgment of the observer. State the number of significant figures in any measurement. Round off a calculated answer to the correct number of significant figures. State the significant figure rules for & . State the significant figure rules for + & . Make a simple data table with labels, units, and straight lines. Recognize a scatter plot versus a bar graph. State that a scatter plot is appropriate when a relationship between the independent variable and dependent variable needs to be made apparent Correctly assign the independent variable to the x-axis of a scatter plot and the dependent variable to the y-axis. Draw a proper graph having a title, labels, units, consistent & appropriate scale. .