Metric system and scientific notation Intro to Science Metric system and scientific notation

SI Unit- ‘Standard International’ OR Metric Unit

SI Base Units Quantity Unit Abbreviation Length Meter m Mass gram g Time Second s Temperature Kelvin K Volume liter L Volume (2nd) Cubic cm cm3

Length (SI unit = meter) How long or how far something is: Length of object Width of objects Distances

Mass (SI unit = gram) The amount of matter (stuff) in an object Sirius- a white dwarf star. 19,000,000,000,000,000,000,000,000,000,000 kg (A golf ball would weigh 2 tons on earth)

Volume Volume- how much space something takes up Can be both liquids or solids

Metric Prefixes Prefix Symbol Multiple of base unit kilo- k 103 hecto- 102 deka- da 101 deci- d 10-1 centi- c 10-2 milli- m 10-3 thousand hundred ten tenth hundredth thousandth

USA compared to Metric USA Metric

METRIC- Based on a Scale of TEN This makes it easy to convert units USA- Stubborn, still doesn’t use it…

Metric System Memes

https://www.youtube.com/watch?v=gdmz3O2lnMQ

Prefixes for grams Milligrams (1 mg) (.001 g) Grams (1 g) Kilograms

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

https://www.youtube.com/watch?v=MekxJse2vgs

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)

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

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

Speed of Light Speed of light: 300,000,000 meters/second 3.00 x 108 m/s

Size of solar system 45,000,000,000 kilometers 4.50 x 1010 kilometers

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

https://www.youtube.com/watch?v=Xz6cYr5tHe0

Format # . # x 10 # Exponent Coefficient

Examples of positive notation Try these: 48 = 5,290=

Examples of Negative Notation Try these: 0.0008900= 0.00058 = .00000258 =