“A brief history of chemical warfare” By Harold Maass For more than 2‚000 years. As early as 600 B.C.‚ the Athenians poisoned the wells of the Spartans‚ who later tried lobbing burning sulfur pitch over the walls of Athens‚ hoping to fill the city with toxic smoke. Genghis Khan used that same trick‚ catapulting burning sulfur pitch during his siege of fortified cities around A.D. 1200. Over the centuries‚ various armies put poisons on arrows and in bullets to make them more lethal. But it wasn’t
Premium World War I Poison Sarin
Physical Science I have learned from my twenty years of service in the U.S. Air Force‚ significant background knowledge of the history of the space shuttle. In September 1969‚ two months after the first manned lunar landing‚ a Space Task Group appointed by the President of the United States to study the future course of U.S. space research and exploration made the recommendation that "…the United States accept the basic goal of a balanced manned and unmanned space program. To achieve this goal‚
Premium Space Shuttle Rocket International Space Station
Observation of Chemical Changes Purpose In this experiment‚ the student studied the composition of materials in a setting where the indications of chemical changes were safely observed. The changes observed consisted of bubble formation‚ colors‚ viscosity‚ and precipitate formation. Procedure Using a well plate: use a different well for each chemical combination. Two drops (unless otherwise noted) of each chemical in the combinations (below) should be placed in one well. A dark and light
Premium PH indicator PH Acid
Observation Paper Alyssa Bosco St. Josephs College Running Head: OBSERVATION ASSIGNMENT ! 1 A very important young girl and boy in my life‚ had let me into their lives in order to complete this assignment‚ allowing me to understand the small and major differences between a healthy child and an autistic child. This observation assignment concerns the physical domain‚ but more specifically the development of gross motor skills. The purpose of this observation is to determine the differences in
Premium Inch Autism Motor control
Production and Properties of Metals Mr J E Chuter‚ Cert Ed 2012 En No 20100292 Introduction I have decided to produce a project based on the production and properties of metals‚ as although I have worked as a welder for over 30 years‚ and a welding teacher for the last 2 years on apart-time basis‚ I felt I didn’t know enough information on the material that I work on‚ on a daily
Premium Iron Steel Zinc
The servitude pertinent to this matter is a praedial servitude‚ relating to two pieces of land‚ adjacent to each other. A paedial servitude is established over the servient property (The Trust) for the benefit of the dominant property (UCT) in perpetuity. A right of way typically confers a real right to benefit from the property of another. It affords powers of use and enjoyment to someone other than the owner. Section 63(1) of the Deeds Registry Act tells us that limited real rights are capable of
Premium Contract Property Easement
Physical fitness Sports such as football or baseball involve lots of physical activities. Sports and exercises help in strengthening and toning the muscles and bones in the body. In short‚ the importance of sports for kids is that it keeps them in an excellent shape. Team Spirit When children or adults plays team sports‚ be it cricket or hockey‚ they learn to work in groups. They learn that if the team wins‚ they win and if the team loses‚ they lose. This way they learn how to work
Premium Physical exercise Physical fitness Obesity
Analysis of a Chemical Reaction Purpose: To observe a chemical reaction and to use qualitative and quantitative evidence to identify this reaction from among four possibilities. Hypothesis: I think the result is going to produce water. I think this is going to happen because there is hydrogen and oxygen inNaHCO3. Materials: -Test tube clamp - 150 mm test tubes (2) - burner - retort stand - clay triangle - iron ring - crucible Procedure: Part A: 1. Add 0.5 g of NaHCO3
Premium Chemistry Chemical reaction Chlorine
Physical Science Review Waves‚ Sound and Light Waves- What are Waves? 1. 1 .The substance that a move through is called a medium. 2. True or False: Particles are squeezed together during rarefactions. 3. True or False: Waves that require a medium through which to travel are called electromagnetic waves. 4. True or False: The matter in the medium moves perpendicular to a transverse wave. 5. What medium is often used to transfer computer information? Optic Fibers 6. 6 .A
Premium Electromagnetism Electric charge Magnetic field
Where? Why there? Why do we care? Physical Geography Focus is on the natural environment. Some Core Geographic Concepts Spatial- is an essential modifier in forming questions and framing concepts. Geography is a spatial science The geographer’s space is the earth space The way things are distributed. The way movements occur Basic observations regarding places: They have location‚ direction‚
Premium Precipitation Climate