Science Skills Ch 1 Notes

What is Physical Science? Four main components of Physical Science? Space and Time Matter and Change Forces and Motion Energy

Scientific Notation Why? 1,200,000,000 = 1.2 x 109 Makes very large and very small numbers easy to work with. 1,200,000,000 = 1.2 x 109 .0000000012 = 1.2 x 10-9

Scientific Notation Multiplying Example Multiply the first numbers Add exponents Example 3.0 x 108 x 5.0 x 102 =

Scientific Notation Dividing Example Divide the first numbers Subtract the exponents Example 1.5 x 1011 / 3.0 x 108 =

Units Units! Units! Units! Units are incredibly important. They give you a frame of reference for your measurements. 10 What?? Donuts? Pennies? Meters? Kilometers? SI Base Units Quantity Unit Symbol Length meter m Mass kilogram kg Temp kelvin K Time second s

kilograms per cubic meter Units Base units are measured. Derived units are calculated Area: m x m = m2 What is the volume of a box where length is 3 m, width is 4 m, and depth is 2 m? SI Derived Units Quantity Unit Symbol Area square meter m2 Volume cubic meter m3 Density kilograms per cubic meter kg/m3

Metric Prefixes Prefix Symbol Meaning Multiply by… giga- G billion (109) 1,000,000,000 mega- M million (106) 1,000,000 kilo- k thousand (103) 1,000 deci- d tenth (10-1) 0.1 centi- c hundredth (10-2) 0.01 milli- m thousandth (10-3) 0.001 micro- µ millionth (10-6) 0.000001 nano- n billionth (10-9) 0.000000001

Metric Prefixes How many km in 215,000 m? How many g in 3.9 kg? How many nanoseconds in 1 megasecond?

Temperature Celcius – Used the most in sience Celcius to Kelvin Subtract 273 and drop “degree” symbol Ex: 112C = _______ K Celcius to Farenheit  F = 9/5( C) + 32.0 Farenheit to Celcius  C = 5/9(F – 32.0)

Practice Pg 29-30 #16-18, 20, 25, 28,