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Journal #5 Why is it important to make sure that you change only one factor (variable) at a time while keeping all other conditions the same? How can the scientific method be applied to everyday life? Graphing Scientific Data Today’s Learning Goal: We will graph lab results. Take out a pencil Get out a piece of graph paper and ruler Importance of graphing data Bar graphs and line graphs show relationships between sets of data They help analyze and understand data that has been collected during a laboratory experiment You will use these graphs for most labs in science. How to graph data Use graph paper - Choose the size graph paper that best fits the data Use a ruler to draw the edges of graph Use pencil so you can easily erase mistakes Number the Y-axis (the vertical one)- Dependent Variable Always start numbering a bar graph at zero Only number as high as your highest value (if the highest value is 18, don’t number to 100!) Line up the numbers on the lines, not in the spaces Evenly space out the numbers (number by 1’s, 2’s, 5’s, etc.) to fill up the page Don’t squeeze your graph into one corner of the paper! Draw the bars on the X-axis (the horizontal one)Independent Variable Make all bars the same width Evenly space out the bars (they should not touch) Label what each bar represents Color in or shade the bars differently Label the graph Put a label on the X-axis to tell what all of the bars represent months, types of plants, etc. Put a label on the y-axis to tell what the numbers represent # of inches in rainfall, # of days, height of plants, etc. Make sure you include the proper units! height of plant in inches, temperature in degrees Celsius, etc. Give the graph a title The title should describe what the graph is about (The Effect of Brand of Fertilizer on How Tall the Plant Grew) Amount of Time Required to Dissolve a gummy bear Liquid Amount of time (seconds) Tap water 15 Hot water 5 Cold water 20 Acidic Water 5 Alcohol 20 Salt water 10 You’re Assignment for Today: Use graph paper and colored pencils to graph the results from your own experiment Answer these questions 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Was your hypothesis correct? After seeing the results of your lab, rewrite your new hypothesis. What variables were tested in this lab? Why do you think you had the results you did? Did you have any accidents or mistakes during your lab experiment? If so, how could you avoid mistakes in the future? What did you learn from this experiment? Do you feel your grouped help you? Do you feel you helped your group? Would you recommend this lab in the future?