Materials: bar magnets (1 for each team of 3 to 4 students) 1 box plastic sandwich baggies white construction paper petri dishes (4 per team) metric scale (1 per team) 1 bucket clean white sand 1 qt. iron filings measuring cups hand lens (1 per team) Data Collection Table (student made) Before class, make synthetic Martian soil in following mixtures, labeled "A", "B", "C", and "D": Activity 3.3 Teacher Demonstration Carefully place 1/4 cup "Martian" soil in clean petri dish.
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