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Beginning with Science Study Sheet

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Beginning with Science Study Sheet
Beginning with Science 02: Scientific Investigation
For this assignment you will do two things:
Part I: Evaluate one experimental design. (10 points)
Part II: Design your own experiment using the scientific method. (40 points)
Review each scenario below, and choose one to complete for your assignment. Each scenario contains specific questions that will ask you to provide examples, explain your suggestions for improvement, and refer to the lesson. Be sure to respond to each question in complete sentences.
Part I: Scenarios (select only one)
Scenario 1
Christopher and Kate noticed that after a rainstorm some of the rocks in their yard appear to shrink. They wondered how the mass of the rocks changed when dissolved in water. To determine this, Kate purchased a variety of rocks from a local shop, carefully recording the types of rocks in a data chart. Christopher gathered rocks from the backyard to add to the rocks Kate purchased. They measured each rock's initial mass; then they inserted the rocks one by one into 100 milliliters of water and measured the mass of each rock after it had sat in the water for five minutes. Both Christopher and Kate concluded that store-bought rocks do not dissolve in water. They also concluded that to get rocks that dissolve in water they must be gathered directly from the yard. 1. Describe why the investigation above is not adequate to explain what types of rocks will dissolve in water. 2. Using what Christopher and Kate have already observed, suggest a possible hypothesis regarding how the mass of a rock changes when placed in water. Identify the independent and dependent variables. 3. Describe, in detail, a procedure to test your hypothesis. Identify the controlled variables.
Scenario 2

Lizzie loves to stargaze at night. She has noticed that the moon appears to change shape over the course of the month, and she wants to investigate why this happens. She hypothesizes that the

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