Scientific Measurements The metric system

Metric Prefixes Kilo = 1000 Hecto = 100 Deka = 10 Deci = 1/10 Centi = 1/100 Milli = 1/1000

Meters, Liters, Grams Meters measure length Liters measure volume Grams measure mass

How Big? A meter is about 39 inches A kilometer is 0.6 mile A centimeter is about the width of your little finger A gram is about the mass of a paper clip A kilogram is 2.2 pounds You drink 2 liters of pop

Other metric units Temperature is measured in degrees celsius or centigrade Heat is measured in calories or joules Weight is measured in newtons Mega = 1,ooo,ooo Micro = one millionth Nano = one billionth

K H D O D C M Changing from one metric unit to another is called metric conversion “O” is the space where meter, liter, or gram belongs Kids Have Dropped Over Dead Converting Metrics Let’s practice!

K H D O D C M To change from one metric unit to another, we simply move the decimal point. For example: 25.4 km = _____________ cm? K-H-D-O-D-C is 5 places to the right 25.4 km = 2,540,000 cm

K H D O D C M 30 cm = ___________hm C – D- O –D- H is 4 places to the left 30 cm = 0.0030 hm (this is the same as 0.003 hm) 14 dal = _____dl D- O –D is 2 places to the right 14 dal = 1400 dl

Scientific notation Rules: 1 digit before the decimal point Multiply the number by a power of 10 Example: Write 34,000 in scientific notation. Solution: 3.4 x 104

Write the following in scientific notation: 4.1 x 106 4,100,000 = _______________ 345,600,000,000 = _________ 0.0456= ________________ 0.00000012=____________ O.00305= ____________ 3.456 x 1011 4.56 x 10-2 1.2 x 10-7 3.05 x 10-3

Write the following in standard form: 4670 4.67 x 103 =__________________ 3.112 x 105 = _________________ 3.112 x 10-4 = ________________ 4 x 10-6 = ___________________ 1 x 1011 = __________________ 311200 0.0003112 0.000004 100,000,000,000

That’s all folks! Time to try some on your worksheets!