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Test Review

Test Review. Math In Science Ch 1.3, 1.4, 1.5. Practice Problems IAN 48. 1. Each unit in the SI system is ___ times bigger than the previous unit TEN 2. When measuring the force of gravity pulling on an object you are measuring ____. Weight

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Test Review

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  1. Test Review Math In Science Ch 1.3, 1.4, 1.5

  2. Practice Problems IAN 48 1. Each unit in the SI system is ___ times bigger than the previous unit TEN 2. When measuring the force of gravity pulling on an object you are measuring ____. Weight 3. Water has a density of 1.0g/cm³, any item with a density greater than this will do what when placed in water? Sink

  3. Practice Problems • Find Mean, Mode, Median, and Range for the following Data Set (round to the nearest tenth) • {12, 9, 7, 9, 11, 8, 9, 12} • Mean: ____________________________ • Mode: ___________________________ • Median: __________________________ • Range: ___________________________ Order least to greatest 7, 8, 9, 9, 9, 11, 12, 12 77 ÷ 8 = 9.625 = round to nearest tenth = 9.6 9 (9 + 9) ÷ 2 = 9 12-7 = 5

  4. Do The Exercise • A scientist was having an assistant measure temperature changes while heating peanut oil during an eight minute period. The starting temperature was 22C. The assistant heated the element as instructed and took the temperature each minute for the next 8 minutes getting these results: • 23C, 27C, 35C, 45C, 61C, 71C, 73C, 79C. • Create a Data Table showing these results • Create a Graph showing these results

  5. Tables and Graphs • results: • 23C, 27C, 35C, 45C, 61C, 71C, 73C, 79C. • Create a Data Table showing these results

  6. Tables and Graphs • results: • 23C, 27C, 35C, 45C, 61C, 71C, 73C, 79C. • Create a graph Since this is “Change Over Time” We should make a _______ graph Title Scalecounts by 20, from 0-80 to fit all data LINE Labeled axes “DRY-MIX” Dependent variable on Y-axis Independent Variable on the X-axis

  7. Displacement Practice • For each graduated cylinder: • Solve for what it counts by • (subtract 2 closest #’s then divide by number of steps) • Find the volume of the object 10. 11. • 26 • 18 • 8cm • 3.2 • 2.0 • 1.2cm 3 3

  8. Density = Mass ÷ Volume • Lithium is the lightest of metals and the least dense of all nongaseous elements. A pure lithium sample with a volume of 13.0 cm3 has a mass of 6.94 g. What is the density of lithium? (round answer to the nearest tenth) D = m/v D= 6.94 g ÷ 13.0cm 3 =0.5 g/cm 3

  9. Calculate Percent Error • Clyde Clumsy was directed to weigh a 500 g mass on the balance. After goofing off for ten minutes, he quickly weighed the object and reported the mass was 458 g. |EV-TV| TV X 100 = | -42 | 500 |458 – 500| 500 X 100 = X 100 = .084 x 100 = 8.4 DIRECTIONS: Set up problem Subtract Divide Multiply Round to nearest tenth (one decimal place)

  10. Website Practice • Mean: http://www.math6.org/graphing/mean_practice/mean.htm • Median: http://www.math6.org/graphing/median_practice/median.htm • Mode: http://www.math6.org/graphing/mode_practice/mode.htm • Range: http://www.math6.org/graphing/range_practice/range.htm • Make a Table: http://www.math6.org/pdf/reteach/6.1.pdf • Graphs: • Bar graphs - http://www.math6.org/graphing/6.4_quiz.htm • Line Graphs - http://www.math6.org/graphing/6.7_quiz.htm • Online Textbook – www.pearsonsuccessnet.com

  11. QUIZ - Ch 1 Lesson 3: Measurement Kilogram SI Temperature Density Length Weight Liter Volume SI unit for mass Standard system of measurement. How hot or cold something is. The amount of matter in a given space. Distance from one point to another. The measure of the force of gravity pulling on an object. SI unit for volume (liquid) The amount of space an object occupies. The amount of matter in an object. SI unit for temperature A duration between events Used to measure the mass of an object Used to measure the volume of liquids precisely (or irregular solids). SI unit for time Used to measure the temperature of an object Formula used to calculate the density of an object. Mass Kelvin Time Balance Graduated Cylinder Seconds Thermometer D= mass/volume

  12. QUIZ - Ch 1 Lesson 4: Math in Science • estimation • Range • accuracy • Mode • Precision • Significant Figures • Percent error • Mean • Median • An approximation of a number • Biggest # minus the smallest # in data set • How close a measurement is to the true value • Most often repeated number in a set of data • How close a group of measurements are to each other • All digits measured exactly, plus one estimated digit • A way to determine how accurate an experimental value is. • A numerical average, add all #’s and divide by how many there are • Middle number in a data set (if 2 #’s are middle find the avg.)

  13. QUIZ - Ch 1 Lesson 5: Graphing in Science • Anomalous data • Dependent variable • Linear graph • Y-axis • graph • Non-linear graph • Line of best fit • X-axis • Independent variable • “TAILS”- title, axes, interval, labels, and scale • A data point that is clearly NOT part of the trend • What variable is plotted on the y-axis? • Data points that yield a straight line • The name of the vertical axis on a graph • A picture of your data • Data points that do NOT fall in a straight line • A smooth line drawn to show a general pattern in a graph • The name of the horizontal axis on a graph • What variable is plotted on the x-axis? • What are the 5 essential elements of a graph?

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