Use the following format for all your lab write ups! 1) Start with Investigative Question: Question based on observation that will be answered in the experiment. “What is the effect of (manipulated variable) on (responding variable)?” “What is the effect of different amounts of solutes, on mass of the gummy bear after it has been sitting in solution for 45 minutes?

2) Identify the variables: Manipulated (independent):The variable that is changed/ variable that investigator “manipulates” Responding (dependent):The variable that is measured due to the change Controlled variable: Other factors that are kept constant so that they cannot affect the responding variable (outcome). - materials and careful techniques are not controlled variables!

3) Formulate a Hypothesis (prediction backed up by reasoning): You MUST back up your prediction with a logical reason. Write a thorough hypothesis by being very clear about the manipulated and responding variables. (Work with your lab partner to write a hypothesis for this investigation)

4) Identify the Groups: Experimental group- set-up that has the manipulated variable Control group- set-up without the manipulated variable TPS: WHY do we need these set-ups? Experimental Groups: Gummy Bear in Karo Syrup Gummy Bear in Water Control Group: Gummy Bear in the air.

5) Materials and Apparatus list: Bulleted list Includes quantities and size Be as specific as possible (example: ‘50 mL beaker’ instead of ‘beaker’); include the volumes of tubes and cylinders, the concentrations of solutions, the model and manufacturer of any complex apparatus. If you have to decide how much of a substance or a solution to use, state your reasoning or show the calculations. Materials List: •Approximately 300 ml of water 300 ml Karo Syrup (concentrated sugar solution) 6-250 ml beakers 1 scale 9 gummy bears (preferably the same color) Paper towels

6) Procedure:

Procedure (cont.) Place 100 ml of water in each of 3-250 ml beaker. Place 100 ml of Karo Syrup in each of another 3-250 ml beaker. Obtain 9 gummy bears. Measure the mass of each gummy bear and record in the appropriate place in a data table. Place one of the gummy bears in each of the beakers. Leave the 3 remaining gummy bears out in the air on the counter. Let sit for 45 minutes. Take out the gummy bear and place it on a paper towel to remove excess solution. Measure the mass of the gummy bears after 45 minutes and record in a data table.

7) Data Collection: Record data accurately and neatly May include both qualitative and quantitative data Data table must include appropriate units in the headings, and a DESCRIPTIVE title Averages are included when trials are indicated

Sample Data Table: Type of Solution vs Mass of the Gummy Bear Trial 1 Trial 2 Trial 3 Initial Mass (g) Final Mass (g) Difference Between Initial and Final Masses (g) Initial Mass Difference Between Initial and Final Masses Average of the difference of all three trials Air Tap Water Karo Syrup This table can be made using MS Word, MS Excel or by hand. Data Tables drawn by hand: Use a ruler. Neat and legible. Make it big enough that I can read it!

8) Data Analysis: Process data in a meaningful way Include graphs and or mathematical calculations ex: calculations for taking an average Communicate patterns and trends

Manipulated Variable & Unit of Measurement TITLE Describes what you are studying KEY Identifies different sets of data found in your graph (should be color-coded) NEATNESS Ruler is used for lines on the graph Ruler is used for the X and Y axis lines Legible handwriting Y-AXIS Responding Variable & Unit of Measurement X-AXIS Manipulated Variable & Unit of Measurement

9) Conclusion: 4 parts Reminders: NO ABBREVIATIONS 1) State whether your hypothesis is “supported” or “not supported” 2) Evidence that your hypothesis is supported or not supported…. Use concrete data. Use range of data when available 3) Errors/improvements (realistic) 4) Modifications to the procedure Reminders: NO ABBREVIATIONS Include all the parts indicated in the directions Metric, metric, metric……