Disaster management. Introduction At the close of the twentieth century, natural hazards and disasters are one of the most common forms of disasters around the world. Natural…

Chapter 1 Cosmic Ray Properties, Relations and Definitions 1.1 i.i.I Introduction General Comments This chapter contains a very rudimentary description of the relevant processes…

1. Chemistry Toombs County High School 2.  The lab technician shown here is using a magnifying lens to examine a bacterial culture in a petri dish. When scientists cannot…

1. Measurement and Evaluation of Thinking Skills (HOTS)ASSOC. PROF DR KAMISAH OSMAN 7 APRIL 2008 2. Measurement and Evaluation What may happen in measurement and evaluation…

1. 1DemocritusDemocritus Around 410 BC,Around 410 BC,originated the idea of theoriginated the idea of theatom.atom. 400 B.C. -400 B.C. - Everything inEverything inthe…

1. Today in ScienceYou will Need:1)Pencil, Colored Pencils, Highlighters orMarkers2)Power Notes – Atomic Structure– 2page 3 sides-Bookshelf- Please Staple 2. REVIEW &…

1. Why is learning about the atom important….? The atom was considered to be an “imaginary” thing, something that people laughed at!Roosevelt trusted Einstein, and…

1. THE HISTORICAL DEVELOPMENT of ATOMS 2. Early Greek Theories 400 B.C. - Democritus thought matter could not be divided indefinitely. 350 B.C - Aristotle modified an earlier…

1. Chapter 4“Atomic Structure” Pre-AP ChemistryCharles Page High School Stephen L. Cotton 2. Section 4.1 Defining the Atom OBJECTIVES: Describe Democritus’s ideasabout…

1. ATOMIC THEORY Lewis 2. 1700’s • In the 1700’s scientist agreed that elements could not be broken down. • 30 +/- elements identified or known • Belief that elements…