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Penny Lab

Penny Lab. Simply Science Approach. Part 1. Playing and Observing. What did you observe?. Brainstorm ideas in the following categories. Drops of water the penny held. What did I observe? What could I change? What would I change?. Part 2. Performing and Recording.

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Penny Lab

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  1. Penny Lab Simply Science Approach

  2. Part 1 Playing and Observing

  3. What did you observe? • Brainstorm ideas in the following categories.

  4. Drops of water the penny held What did I observe? What could I change? What would I change?

  5. Part 2 Performing and Recording

  6. Planning your experiment • Pick one thing about the Penny Lab that you will change. • Your independent variable • You will count the number of drops you can get onto a penny without the water spilling off. • Your dependent variable • List the things about the Penny Lab that you could change but will keep constant. • Your control variables

  7. Planning your experiment • Write down a question for your experiment • E.g. “How will soap affect the number of drops?”?” • Write down a hypothesis for your experiment • E.g. “If soapy water is added to the penny, then the number of drops that can fit on a penny will decrease.” 3. Write down a prediction for your experiment • E.g. “If soapy water is added to the penny, then the number of drops that can fit on a penny will decrease I think this will happen because...”

  8. Procedure • Write a procedure to test your hypothesis. • Step by step process for the experiment (past tense, passive voice) • Use the following format: • Use complete sentences • Should be written in numbered steps • steps that are common sense should be omitted (for example: “Goggles were used”; “The materials were gathered”). • Always use the past tense ( “A pipette was used…”) • Describe what you changed and measured • Describe how you kept other factors constant (controls) • Provide enough detail so that someone could repeat your experiment just using your procedure • Safety precautions and proper disposal of chemicals should be included in your procedure. E.g., • 10-cm long sheets of each paper towel brand were used. • 3-mL samples of 2% milk were placed on a wooden surface. • Once you show your procedure to your teacher, you may begin your experiment.

  9. Procedure-Example 1. A micro-well was filled half full with distilled water. 2. A small amount of sodium chloride was added to the water. 3. The mixture was stirred with a glass stirring rod. 4. The conductivity of the mixture was tested using the conductivity tester. 5. Steps 1-4 were repeated for all samples.

  10. Conducting your experiment • Plan an experiment and collect data according to the following table.

  11. Analysis and Conclusions • Analyze the data and draw conclusions. Write a paragraph below (using complete sentences) that explains how your independent variable affects the the number of drops that can fit on a penny , using your data to help you answer the question. Suggest a reason for your observations(Why did it happen). Support or reject your hypothesis.

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