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Scientific Measurements

Scientific Measurements. Measurement-. Ex. “a long way” vs. 161 miles. An Observation made by comparing something to a standard. -“miles” is the standard -It’s the same no matter where you go. SI- International system of Units. (French). -most of the world uses it

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Scientific Measurements

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  1. Scientific Measurements

  2. Measurement- Ex. “a long way” vs. 161 miles An Observation made by comparing something to a standard -“miles” is the standard -It’s the same no matter where you go

  3. SI-International system of Units (French) -most of the world uses it (-almost the same as the metric system)

  4. The Advantage of the Metric System 1. 2. 3.

  5. 1. Same all over the world -Easy to share information

  6. 2. Decimal based system -like $ : 10cents =1dime 10 dimes = 1 dollar -Multiply or divide by 10

  7. 12 in. = 1 foot 3 ft. = 1 yard 1760 yards = 1 mile ? -Not like our system SAE

  8. 3. Easy to convert 10 centimeters = 1 decimeter 10 decimeters = 1 meter 10 millimeters = 1 centimeter 10 meters = 1 decameter 10 decameters = 1 hectameter 10 hectameters = 1 kilometer

  9. Using the Metric System Temperature Density Volume Area Distance

  10. 1. Length / Distance ( meter stick ) Meter (m)- The basic unit of length or distance in the metric system

  11. Kids Moving around in the metric system X10 Hate Doing Miss Kilometer (Km) Hectometer (hm) Decameter (dkm) Meter(m) Decimeter (dm) Centimeter (cm) Millimeter (mm) Dales Crazy /10 Math

  12. For every step you go up or down . . /10 X10 Kilo - Hecto - Deca - Meter Deci - Centi - Milli -

  13. Ex. cm2 2. Area – measured in square units Area = Length X Width (rectangle) A = L X W A = L X W 4 cm A = 4cm X 5cm A = 20 cm2 5 cm

  14. 3. Volume – The amount of space an object takes up (occupied by mater) Ex. cm3 A. Liquid B. Regular Solid C. Irregular Solid

  15. A. Liquid Liter (L) – a commonly used unit of volume in the metric system Ex. 2 liter

  16. A. Liquid -To measure, use a graduated cylinder Read the bottom of the meniscus 1 L = 1000ml 1 ml = 1/1000 L

  17. B. Regular Solid -To measure, use a metric ruler Ex. block Volume = Length X Width X Height V = L X W X H

  18. V = L X W X H B. Regular Solid 3 cm 2 cm 6 cm V = 6cm X 2cm x 3cm V = 36 cm3

  19. Ex. Bob C. Irregular Solid -Use a graduated cylinder Water Displacement Vf - Vi = V Vf Vi 20- 15- 10- 5- 20- 15- 10- 5- 20ml – 15ml = V 5ml = V

  20. - The amount of matter in an object 4. Mass Measure with a triple beam balance Measured in Kilograms: Kilograms (Kg) – the basic unit of mass in the metric system 1 Kg = 1000 g Or 1 g = .001Kg • 1g = paper clip • Mass vs. Weight?

  21. - The amount of mass in an given volume 5. Density (Mass per unit volume) _Mass_ Volume Density = • Ex. Lead – 1 cm3 mass = 11.35g _11.35g_ 1 cm3 Density = = 11.35g/cm3

  22. Will It Sink Or Will It Float? The density of water is 1 g/cm3 < 1 g/cm3 Float!! > 1 g/cm3 Sink!!

  23. USA - Fahrenheit - oF 6. Temperature Absolute scale of Temp. SI - Kelvin - K - • Absolute Zero – the lowest temp. that matter can have Science - Celsius - oC (Water) – freezes – 0oC – boils – 100oC

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