Intro to Science Metric system and scientific notation

Intro to Science Metric system and scientific notation

SI Units 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 (2 nd) Cubic cm cm 3

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 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 kilohectodekadecicenti- k h da d c Multiple of base unit 103 102 101 10 -2 milli- m 10 -3 thousand hundred 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=gdmz 3 O 2 ln. MQ

Prefixes for grams § Milligrams (1 mg) § (. 001 g) § Grams (1 g) § Kilograms § (1000 g)

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=Mekx. Jse 2 vgs

Converting: Step by Step process (100 g to mg) § 1. Write what you HAVE down (100 g) § 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 § 100 kg = _______g § 21. 3 dag=_______g § § § 10 g=_____kg 100 mg=_______g 21. 3 dg=_______g

Scientific Notation § Many quantities that scientists work with are very large or very small values. For example: § 3, 000, 000 electrons’ worth of charge pass through a standard light bulb in 1 second § 0. 00001 kg is the mass of ink used to dot an i in a textbook

Speed of Light Speed of light: 300, 000 meters/second 3. 00 x 108 m/s

Size of solar system 45, 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=Xz 6 c. Yr 5 t. He 0

Format §#. # x 10 Coefficient # Exponent

Examples of positive notation § § § 1. 2. 3. 12, 300 = 1. 23 x 104 520 = 5. 2 x 102 1500= 1. 5 x 103 § Try these: § 48 = § 5, 290=

Examples of Negative Notation § § § 1. 2. 3. 0. 0025 = 2. 5 x 10 -3 0. 800 = 8. 0 x 10 -1 0. 000901 = 9. 01 x 10 -4 § Try these: § 0. 0008900= § 0. 00058 = §. 00000258 =