Scientific Method and Drinkable Fresh Water

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Unit Project

Documenting the Scientific Method
Separating Mixtures Project

Separating Mixtures: How can you separate salt water to make pure and drinkable fresh water?

Design and build a device to separate a mixture of salt water into its components. For example, what device could you build to get the most drinkable water from salt water if you were on a stranded island in the middle of the ocean? Gather data on the amount of water collected and the purity of the water, which can be done through taste tests. Change one variable at a time as you alter your device to obtain more water or more pure water.

Step 1: Observe/question
• Question: How can you separate salt water to make pure and drinkable fresh water? • Research: A minimum of 1 page typed in an outline format. You must include at least 5 resources in the proper bibliography format (2 of the 5 sources must be a book/encyclopedia/scientific magazine). • Any words included in your outline that a typical 8th grade student would not understand MUST BE DEFINED and EXPLAINED within the outline! • Research topics:

o Types of mixtures
o Salt water’s chemical make-up.
o Methods of separating mixtures.
o Pros & Cons of each method of separating mixtures.

Step 2: Hypothesis
• Sketch a design for your separating mixtures device. Label each part of your device with the object name and briefly describe what is occurring at that point. This part of your project does not have to be typed, but remember to write legible! • Write a short paragraph answering the following question: what part of your research led you to this hypothesis? (Make sure to explain WHY you chose this as your hypothesis.)

Step 3: Experiment
• TAKE PICTURES OR VIDEO DURING YOUR EXPERIMENT PROCESS. THIS IS A REQUIRED PORTION OF YOUR WRITE-UP! THE PICTURES/VIDEO WILL ALSO BE GREAT FOR YOUR PRESENTATION! • You will need to collect a lot of...
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