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Intro to Science

Intro to Science. Metric system and scientific notation. SI Base Units. Mass measures how much matter is in something. 199000000000000000000000000000000 kg (1.99 X 10 30 kg). .00000000000000000000000016 grams (1.67 X 10 -24 g). Volume measures how much space something takes up.

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Intro to Science

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  1. Intro to Science Metric system and scientific notation

  2. SI Base Units

  3. Mass measures how much matter is in something 199000000000000000000000000000000 kg (1.99 X 1030 kg) .00000000000000000000000016 grams (1.67 X 10-24 g)

  4. Volume measures how much space something takes up Cubic centimeters (cm3) Milliters (mL)

  5. Metric Prefixes

  6. Prefixes for grams • Milli • Milligrams • 1/1000 of a gram • Grams (base) • Kilo • Kilogram • 1000 grams

  7. King (kilo) Hector (hecto) Drinks (deka) Ultra (unit) Delicious (deci) Chocolate (centi) Milk (milli) Mnemonic device for remembering prefixes

  8. Converting: Step by Step process (100g to mg) • 1. Write what you HAVE down (100g) • 2. If there is no decimal, put it in (100.g) • 3. Use the KHDUDCM mnemonic • Where you start • Where you end up • Find how many steps you moved over • 4. Move decimal the number of steps and fill in zeros Be sure to put NEW unit in (100000 mg)

  9. Let’s try these together… • 10 g = ________mg • 100kg = _______g • 21.3dag=_______g • 10g=__________kg • 100mg=_______g • 21.3dg=_______g

  10. Scientific Notation • Many quantities that scientists work with are very large or very small values. For example: • 3,000,000,000,000,000,000 electrons’ worth of charge pass through a standard light bulb in 1 second • 0.000000001 kg is the mass of ink used to dot an i in a textbook

  11. Scientific Notation (cont) • Scientific Notation is used to make numbers easier to read, write and keep track of. • Pointers: • Positive exponents show a very large number • Negative exponents show a number smaller than 1

  12. Format • # . # x 10 #

  13. Examples of positive notation • 1. 12,300 = 1.23 x 104 • 2. 520 = 5.2 x 102 • 3. 1500= 1.5 x 103 • Try these: • 48 = • 5,290=

  14. Examples of Negative Notation • 1. 0.0025 = 2.5 x 10-3 • 2. 0.800 = 8.0 x 10-1 • 3. 0.000901 = 9.01 x 10-4 • Try these: • 0.0008900= • 0.00058 = • .00000258 =

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