Scientific Measurements The metric system Metric Prefixes Kilo

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 • Micro = one millionth • Nano = one billionth

KHDODCM n n 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!

KHDODCM n n To change from one metric unit to another, we simply move the decimal point. For example: n n n 25. 4 km = _______ cm? K-H-D-O-D-C is 5 places to the right 25. 4 km = 2, 540, 000 cm

KHDODCM n n n 30 cm = ______hm C – D- O –D- H is 4 places to the left 30 cm = 0. 0030 hm n n (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 n 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: 6 4. 1 x 10 n 4, 100, 000 = ________ 11 3. 456 x 10 n 345, 600, 000 = _____ -2 4. 56 x 10 n 0. 0456= ________ -7 1. 2 x 10 n 0. 00000012=______ -3 3. 05 x 10 n O. 00305= ______

Write the following in standard form: n n n 4670 4. 67 x 103 =_________ 311200 3. 112 x 105 = _________ 0. 0003112 3. 112 x 10 -4 = ________ 0. 000004 4 x 10 -6 = __________ 100, 000, 000 1 x 1011 = _________

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