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THE METRIC SYSTEM

THE METRIC SYSTEM. A Global System of Measurement. Introduction. Definition- A system of measurement units used all over the world. Same “Language” Measure anything Base 10 system Base units Move decimal left or right to convert between units.

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THE METRIC SYSTEM

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  1. THE METRIC SYSTEM A Global System of Measurement

  2. Introduction • Definition- A system of measurement units used all over the world. • Same “Language” • Measure anything • Base 10 system • Base units • Move decimal left or right to convert between units. • Prefixes change the units by a factor of 10.

  3. Length • DEFINITION: measurement of distance from one point to another • Unit- Meter (m) • Equipment- meter stick and metric ruler

  4. Length Tips • Make sure you start at the 0 mark, NOT at the end of the metric ruler or meter stick. • Read the meter stick by counting the large, numbered tick marks as centimeters and by reading the small, unnumbered marks as millimeters.

  5. LengthEquivalents

  6. LengthEstimates Pinkie Step

  7. Mass/Weight • DEFINITION: • Mass- a measurement of the amount ofmatter that makes up and object • Weight- a measurement of the effect ofgravity on an object • Unit- gram (g) • Equipment- triple beam balance, spring scale

  8. Mass/WeightMeasurements

  9. Mass/WeightMeasurements • Direct measurement- for solid objects: • Indirect Measurement- for liquid objects: • Tips- • Make sure your balance is zeroed out before beginning to measure by turning the knob. • Get down at eye level to read the balance.

  10. Mass/WeightEquivalents

  11. Mass/WeightEstimates Pineapple Dollar Bill

  12. Volume • DEFINITION: the amount of space an object takes up • Unit- liter (L), cubic centimeter (***1 mL = 1 cm3***) • Equipment- graduated cylinder, beaker, micropipettes • Measurements • Direct: When measuring Volume of a liquid. • Place the liquid into the graduated cylinder. • Tips: • Get down at eye level to read the graduated cylinder • Read the cylinder at the bottom of the meniscus.

  13. VolumeMeasurements The volume of this liquid is 66mL

  14. Water Displacement • Water Displacement-When measuring the volume of a solidobject: • Get a beaker with water that the object can be fully submerged in. • Record the water level in the beaker before the object is in the water. • Then, place the object in the water. • Record the new height of the water in the beaker • Take the new height of water and subtract the original height of the water from it • The answer is the volume of the object

  15. VolumeEquivalents

  16. VolumeEstimates Coke Mentos

  17. Time • DEFINITION: a measure of change • Unit: second (s) • Equipment: stopwatch, clock • Equivalents:

  18. Temperature • DEFINITION: A measure of the average amount ofheat contained in an object • Unit: Celsius (C) • Equipment: thermometer • Standard Equivalents:

  19. TemperatureEstimates • Room Temperature= 68F = 20C • Water Freezes At: 32F = 0C • Water Boils At: 212F = 100C

  20. Density • DEFINITION: the amount of matter in a given amount of space. • Unit: Grams per milliliter (g/mL) and Grams per Centimeter cubed (g/cm3) • Equipment: No direct measurement can be measured, must be calculated.

  21. DensityEstimates Brick Pillow

  22. Speed DEFINITION: the change in position over time. • Unit: meters per second (m/s), kilometers per hour (km/hr) • Estimate: 1.3 m/s= normal walking pace; 62 mi/hr= 100 km/her • Equipment: No direct measurement can be measured, must be calculated. • Equivalents

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