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Measurements and Calculations

Measurements and Calculations. always have a magnitude (some sort of number, the amount) always have units (kilograms, milliliters, centimeters) Examples 25 m/s, not just 25 150 grams, not just 150 347 liters, not just 347. Warm Up #1 8-20-12.

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Measurements and Calculations

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  1. Measurements and Calculations • always have a magnitude (some sort of number, the amount) • always have units (kilograms, milliliters, centimeters) • Examples 25 m/s, not just 25 • 150 grams, not just 150 • 347 liters, not just 347

  2. Warm Up #1 8-20-12 • What is the relationship between independent and dependent variables? • Why do scientists need a control group? • What does it mean to have a constant?

  3. Warm Up #2 8-21-12 • List the 6 steps of the Scientific Method. • How many feet are in a mile? • How many centimeters in a meter? • How many millimeters in a meter? • How many millimeters in a centimeter?

  4. Warm Up # 3 8-22-12 • Name the three types of units used when measuring temperature. • Convert: 789 mm to Dm • Convert: 44448888mg to Kg • Convert: 45 HL to dL • Convert: 4500 meters to KM.

  5. Warm Up #4 8-23-12 1. What unit is used when measuring volume? 2. How many mL does the graduated cylinder below measure? 3. What is another name for the term applied science? 4. If I half the mass and volume of an object, what happens to its density?

  6. Precision and Accuracyin measurements Precision • A gauge of how exact (or close) a measurement is Accuracy The closeness of a measurement to the actual value

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