s(1.)Biology Skills Set ACT PREP.Mr. Hunter, Hyde Park Academy03/08/2010http://www.mrhunterspage.blogspot.com
Mr. Hunter Biology• Objective• SWBAT• Understand basic scientific terminology in relation to data presentation.• Distinguish between three types of graphs of data.• Understand the relationship of metric unit conversions
There are different types of variables in science Variables -Data(information being examined) A. Quantitative data: information that can be discretely counted (measured). Ex: numbers, quantities, or amounts B. Qualitative data: information that cannot be directly measured. Ex: colors, moods, shapes etc. C. Independent variables: That information which is subject to change in an experiment – they are values that you can manipulate. Ex: pH values, temperatures, additive amounts, etc. (x-axis) D. Dependent variables: That information which is measured in an experiment. Ex: distance, rates, number of items etc. It is the observed result of the independent variable being manipulated. (y-axis)
Data-variables can be displayed graphicallyGraphical Representation A. A line graph gives information among discrete data points. One can determine if relationships (correlations) exist among the data. Lines constructed should be of “the best fit” to the data. Line graphs are very common in scientific research. B. Bar graphs give information related to quantities (amounts) – proportional values taken over a period of time or different conditions – usually for small data sets C. A pie chart gives information on percentage (%) relationships. Pie graphs are not normally used for scientific data analysis.
Units and ConversionsUnits of Measurements Metric ConversionsA. Weight: measured in grams (g)B. Liquids: measured in liters (L) King Henry Doesn’t Usually Drink Chocolate MilkC. Length measured in Meters (m)D. Time: measured in seconds (s) K = Kilo Ex: 12.54km = x cm =1254000cmSimple Conversions and prefixes H = Hecto• Deci: 1/10 0.1 D = Deca• U = Units Ex: 458ml = x hl = .00458 hl Centi: 1/100 .01 D = Deci• Mili: 1/1000 .001 C = Centi• Micro: 1/1000000 .000001 M = Mili Ex: 10dg = x Kg = .0010 Kg• Nano: 1/1000000000 .000000001• Deca: 10 Conversion of Fahrenheit to Celsius:• Hecto: 100 25(F) = (25-32) * 5 / 9• Kilo: 1000 Celsius to Fahrenheit• Mega: 1000000 45(C) = (45 * 9 ) / 5 + 32
Practice ProblemsKing Henry Doesn’t Usually Drink Chocolate Milk1. 1000 ml = ______ L 2. 500 ml = ______ L 3. 4.4km = ________ cm4. 25dg = _________ Kg5. 45HL = __________ ml
Practice Problems SolutionsKing Henry Doesn’t Usually Drink Chocolate Milk1. 1000 ml = __1.0____ L 2. 500 ml = __.500____ L 3. 4.4km = __440,000______ cm4. 25dg = _.0025________ Kg5. 45HL = ____4,500,000______ ml
Graduated Cylinders, Tools of the TradeFlasks and Beakers A. Graduated cylinders, flasks or beakers are used to measure amounts of liquid. B. The units for volume are measured in liters. C. To read the measured amounts of volume locate the meniscus of the liquid. Match the bottom portion of the meniscus with the marked measurements on the beaker or the flask to determine the amount of liquid.
Tools of The Trade Scales(Triple Beam Balances) A. The scale can be used to measure how heavy an object is. B. The unit of weight is the gram. C. To determine the weight of an object on a triple beam balance, move the individual sliding scale weights (masses) until the balance mark is level. D. Add the total masses of the sliding scale weights to determine the total weight of the object.
Tools of The TradeRulers (Meter Sticks) A. The meter stick or ruler can be used to measure the lengths of objects. B. The unit of length is the meter (M) – which can be denoted in smaller or larger increments depending upon the size of the object being measured.