## Physics Lab Report Cooling Coffee Essay

In this practical, you will be assessed on Design, Data Processing & Presentation and Conclusion & Evaluation – Read the checklist of the criteria for guidance.

Introduction: It is Saturday afternoon. You brew yourself a cup of coffee and are Just about to pour cold milk into the coffee. The doorbell rings and you realize immediately that your friend needs your help for a few minutes this afternoon. If you want to have your coffee as warm as possible after you helped your friend, what would be wise to do?Should you pour the milk now, or after you come back? Or does it make no difference? I would like to add the milk into coffee after I come back. Because the hot coffee without milk will cool longer than the warm coffee with milk. Aim: To find out the relationship between the time at which the milk is added, and the final temperature of the coffee/milk mixture. Every minute the coffee was getting cooler (milk was getting warmer until the room temperature), but when we added the milk into coffee it started to cool more faster.

I Formulates a research question that is incomplete or identifies only some relevant variables. I Does not identify a research question AND does not identify any relevant variables. I Marking Checklist: Research Question (ARQ) or Aim clearly stated I I ARQ/Aim includes Independent Variable (IV)and Dependent Variable (DVD) correctly identified with units/ range I DVD correctly identified with units I Prediction is quantitative I I A sketch graph is included, with explanation IPrediction is explained using scientific theory I I Aspect 2 | Controlling variables I Designs a method for the effective control of the variables.. I Designs a method that makes some attempt to control the variables. I Designs a method that does not control the variables. Marking Checklist Method to manipulate IV, including specific details of range or increments I Method for recording results, including units I Diagram of equipment or experimental set-up I Controlled variables presented as a table: * List all variables to be controlled each variable: I I How could it impact the results?I Exactly how will it be controlled? I I Design I Complete 12 | Partial/ 1 | Not at all/O I Aspect 3 | Developing a method for the collection of data I Develops a method that allows for the collection of sufficient, relevant data I Develops a method that allows for the collection of insufficient, relevant data I Develops a method that does not allow for any relevant data to be collected I How will your results be presented? I Does your plan address the research question? O have sufficient repeats at each value to ensure reliability? I I Is your method clearly presented and can it be easily followed by others? I I Have you addressed safety? I I Data Collection and Processing DC I Complete 12 | Partial/ 1 | Neonatal/O I Aspect 1 | Recording raw data I Records appropriate data including units.

I Records appropriate data but with some mistakes or omissions. I Does not record any appropriate raw data OR raw data is incomprehensible.Raw data clearly distinguished from processed data (possibly separate table) Units of IV and DVD present and correct I All data are recorded correctly and honestly I I Decimal points consistent throughout I Decimal points consistent with precision of the measuring equipment I DC I Complete 12 | Partial/ 1 | Notate all/O I Aspect 2 | Processing raw data I Processes the raw data correctly. I Processes raw data, but with some mistakes and/ or omissions. I No processing of raw data is carried out OR major mistakes are made in processing.

I Calculations to determine DVD carried out, if necessary Mathematics correctly applied I I Worked example calculations given I I I I Calculations address Processed data (and decimal places) consistent with precision of recorded data I I Data Collection and Processing I Complete 12 | Partial / 1 | Not at all 10 | Aspect 3 | Presenting processed data I Presents processed data appropriately I Presents recessed data appropriately but with some mistakes or omissions I Presents processed data inappropriately or incomprehensibly I Does your graph have an informative title?I Is it an appropriate size with suitable scales? Are the axes labeled with S. L. /metric units? I Are all the points accurately plotted? I Does it have a suitable line of best fit? I I CE I Complete 12 | Partial/ 1 | Neonatal/O I I Concluding I States a conclusion, with Justification, based on a Aspect 1 reasonable interpretation of the data I States a conclusion based on a reasonable interpretation of the data I States no conclusion or the conclusion is based on an unreasonable interpretation of the data I Have you stated the patterns or trends in your data with reference to your graph?

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