Language Barrier Scientific Notation SI Units Aim How

“Language Barrier”

Scientific Notation & SI Units Aim: How can we represent very large or very small numbers?

Scientific Notation • A convenient way to represent very large or very small numbers • Changing a very LARGE number into scientific notation will move the decimal to the LEFT and INCREASE the power of 10 • Changing a very SMALL number into scientific notation will move the decimal to the RIGHT and DECREASE the power of 10 • In the end, having 2 DECIMAL PLACES in your answer is always a safe bet

Examples

Expanding from Scientific Notation • When scientific notation has a POSITIVE exponent, you move the decimal point to the RIGHT • But if the exponent has a NEGATIVE exponent, you would then move decimal point to the LEFT

Examples

Mu

SI Units SI = “International System” Measurement Unit Symbol Length Meter m Time Seconds s Mass Kilograms kg Temperature Kelvin K Quantity of Matter Mole mol Electrical Current Ampere (Amp) A Brightness Candela cd

Examples

Tips on Unit Conversions ↓MEMORIZE↓ • • • 1 min = 60 s 1 hr = 60 min = 3600 s 1 m = 100 cm = 1000 mm 1 km = 1000 m 1 kg = 1000 g ↓UNDERSTAND↓ • • • 1 mm = 0. 04 in 1 cm = 0. 4 in 1 m = 3. 28 ft 1 km = 0. 62 miles 1 kg = 2. 2 lbs

Calculators • You must bring in a calculator EVERY DAY! • It can be either a SCIENTIFIC or GRAPHING calculator • Your calculators must at least have all three TRIG FUNCTIONS and the EE FUNCTION

How to use the EE Function • The best (and safest) way to input scientific notation numbers is by using the EE function • The EE translates to “× 10 n” (3× 108 3 E 8) • Different calculators have different methods to do this. PLEASE UNDERSTAND HOW TO USE YOUR OWN CALCULATOR!!! • Lets try one together…

Multiply 3× 108 and 7× 10 -5

Divide 3× 108 by 7× 10 -5

SUMMARY • Describe how to write a number INTO scientific notation • Describe how to expand a number FROM scientific notation • Which three prefixes for the powers of 10 will we be using the most? • List all of the SI units and what they measure – Which three will we be using the most? • How should you input scientific notation into a calculator and why?