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Published byKelley Kelly Modified over 5 years ago

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Introduction to Science

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The Scientific Method – a systematic approach to solving a problem The Way Science Works

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State the problem / pose a question

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Research the problem / gather information by making observations

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Form a hypothesis – educated guess to answer the question

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Design an experiment Must be repeatable Controlled experiments only test one variable at a time Independent variable – (manipulated) – the variable changed Dependent variable – (responding) – the variable observed

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Observe and record data, then analyze If the hypothesis is inaccurate, restate and develop a new hypothesis

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Arrive at a conclusion Be able to repeat the experiment Theory: a well-tested explanation for a wide range of observations or experimental results Law: an observed pattern in nature, but does not provide an explanation for it

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Metric Measurements & Measuring Tools The metric system is based on units of 10

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Metric Measurements & Measuring Tools Distance (length) Unit of meter (m) = about 39 inches Measured with a ruler (estimate to the 0.01 cm)

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Metric Measurements & Measuring Tools Mass (how much matter) Unit of gram (g) = about 1 paperclip Measured with a balance (estimate to the 0.01 g)

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Metric Measurements & Measuring Tools Volume (how much space) Unit of Liter (L) for liquids = about 1 quart Measured with a graduated cylinder Must read the meniscus (bottom of liquid)

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Metric Measurements & Measuring Tools Volume (how much space) Unit of cubic centimeters (cm 3 ) for solids = about 1 sugar cube Calculate with a formula (e.g., volume of cube = lwh) 1 mL = 1 cm 3

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Metric Measurements & Measuring Tools Temperature (measure of the motion of particles) Unit of degrees Celsius ( o C) = 22 o C is room temp Measured with a thermometer

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Metric Measurements & Measuring Tools Weight (affect gravity has on an object) Unit of Newton (N) = about 1 apple Measured with a scale

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Metric Measurements & Measuring Tools Density (amount of matter in a given space) Density = mass / volume (D = m/V) Units of g/mL (liquids) or g/cm 3 (solids) When calculating density, must use 5-Step Problem Solving

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