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Matter and Density

Matter and Density. Stating a Measurement. In every measurement there is a Number followed by a Unit from a measuring device. International System of Units (SI). adopted in 1960 seven base units which all others can be derived m, kg, K, s, mol, cd , A. SI measurement.

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Matter and Density

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  1. Matter and Density

  2. Stating a Measurement In every measurement there is a • Number followed by a • Unit from a measuring device

  3. International System of Units (SI) • adopted in 1960 • seven base units which all others can be derived • m, kg, K, s, mol, cd, A

  4. SI measurement • Le Système international d'unités • The only countries that have not officially adopted SI are Liberia (in western Africa) and Myanmar (a.k.a. Burma, in SE Asia), but now these are reportedly using metric regularly • Metrication is a process that does not happen all at once, but is rather a process that happens over time. • Among countries with non-metric usage, the U.S. is the only country significantly holding out.The U.S. officially adopted SI in 1866. Information from U.S. Metric Association

  5. Common Metric Prefixes

  6. Matter • properties are that it has: • mass: amount of matter (atoms) in an object • volume: amount of space an object takes up • density: the mass per unit volume of an object What some things that are not matter?

  7. Length • a linear measurement • meter (m) • common units- cm, m, km

  8. Volume • space occupied by a sample of matter • cubic meter (m3) but we use the non SI unit liter (L) most of the time instead • common units- L, ml, cm3, µL • should be measured at 0°C

  9. Mass • this in NOT weight • measures the quantity of matter • kilogram (kg) • common units- kg, g, mg, µg

  10. Anders Celsius 1701-1744 Lord Kelvin (William Thomson) 1824-1907 • Temperature • measures kinetic energy of particles • kelvin (K) • common units are K and °C Notice that 1 Kelvin = 1 degree Celsius

  11. Learning Check Match L) length M) mass V) volume ____ A. A bag of tomatoes is 4.6 kg. ____ B. A person is 2.0 m tall. ____ C. A medication contains 0.50 g Aspirin. ____ D. A bottle contains 1.5 L of water. M L M V

  12. Back to the Future “Your are my density” clip. Back to the Future “Your are my density” clip Density • an intensive or intrinsic property of matter • the ratio of an object’s mass to its volume • depends on only on the substance, NOT ON THE SIZE of the substance • as temperature increases, density normally decreases (thermal expansion)

  13. Density D = M/V D = density M = mass V = volume

  14. Example problem • A piece of lead has a mass of 56.4 g and a volume of 5.3 cm3. Calculate its density. given formula set up problem answer w/ unit of measurement M= 56.4 g D=M/V V= 5.3 cm3 56.4g/5.3 cm3 11 g/cm3 cm3is same as mlso sometimes see g/ml

  15. Platinum Mercury Aluminum 13.6 g/cm3 21.5 g/cm3 2.7 g/cm3

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