Homework – Chapter #2 and #3 1. What is an atom‚ what is an atom composed of and what are the charges of each Component? 2. What is an element? 3. What is atomic number and atomic mass? 4. What is an isotope and how do isotopes interact with other atoms? 5. What is a radioactive isotope? 6. Draw the shell model for the elements carbon‚ oxygen‚ sodium and chloride? 7. What does inert mean? 8. Define chemical bond‚ molecule‚ compounds‚ and mixture. (Give examples) 9. Write a chemical equation
Premium Atom Cell Protein
When most people hear the term fossil dating‚ two things come to mind‚ one being‚ “Is that what you’re grandparents do?” (Valls‚ biology class) and two‚ “what is that?”. By using either relative or radioactive dating methods‚ most geologists have the ability to tell how old a single fossil is. As always though‚ we are left with the question of which is better? Delve deeper to understand the comparisons and contrasts of Relative and Radiometric dating‚ as well as further information on both topics
Premium Radioactive decay Fossil Geology
Before there were any true scientific dating methods‚ scientists depended on their past archives of fossils and strata in order to determine how old a newly found fossil was. However‚ it wasn’t until the mid 20th century that scientists could abandon this pathetic‚ inaccurate process and move into a more acceptable precise and detailed procedure. The old way was done by comparing one fossil to other fossils found in the same layer of the earth’s ground and studying the physical characteristics of
Premium Evolution Fossil Carbon
------------------------------------------------- Service quality Continuity of supply In 2004‚ water supply was available on average for 18 hours each day in the West Zone of Metro Manila and 21 hours in the East Zone. According to their respective websites‚ the utility responsible for water supply in the East Zone of Metro Manila increased 24-hour water from 26% in 1997 to 98% in 2007‚ whereas in the West Zone‚ 42% of the customers had an uninterrupted supply in 2007. In a 2004 sample of 45
Premium Water
The Manhattan Project was secret military project created in 1942 to produce the first US nuclear weapon. The Manhattan Project basically arrived from the ideals and fears of a Nazi Germany having access to nuclear capabilities during the war‚ and the threat of them using those nuclear weapons was at an all time high during the reign of Hitler. In order to combat this alarming problem‚ the United States government/military started a top secret program to help develop the world’s first nuclear weapon
Premium World War II Manhattan Project Nuclear weapon
Dangerous yet Effective Richard Fuhrmann English 1A Dixon 09May2012 I. Introduction II. Characteristics A. Density B. Radioactive C. Fracturing III. Why we used it IV. Health Risks A. Effect B. Chances V. Environmental Effects A. Air B. Water C. Land VI. Uses A. Bi product B. Weights C. Radiation Shielding D. Ammunition E. Armor 1. DU 2. What it stops 3. What penetrates VII. DU vs. Tungsten VIII
Premium Uranium
intracavitary radiation) In this procedure the radiation oncologist places radioactive material (usually radium‚ cesium‚ or iridium)‚ into or onto the inflicted area. The purpose is to place the radioactive material as close to the tumor as possible. This can be done in two ways: (i) The radioactive materials are put in a sealed container‚ such as a tube or
Premium Cancer Radiation therapy Ionizing radiation
Rosemary Hurrey EAS-101-OL009 10 July 2013 Written Assignment 1 Answer the following questions. 1.Summarize advances over time in determining the age of the Earth‚ including the importance of the discovery or radioactivity. Throughout the past few decades‚ there have been advancements in new techniques to help determine the age of the Earth. Currently scientific evidence believes that the Earth is between 4.5 and 4.6 billions years old. To help determine the age of the earth‚ radiometric dating
Premium Earth Sun Geology
Tsunamis become disasters because of the human context in which they occur. Do you agree or disagree with this statement? Use examples of known tsunami events recently and in the past to illustrate your arguments. According to Wisner et al 2004‚ "disasters occur when hazards meet vulnerability‚” implying that in unpopulated areas hazards can not become disasters as there is no vulnerability (Quarantelli E.L. 1998). Without humans being involved‚ tsunamis are nothing but giant waves; they may modify
Premium Chernobyl disaster 2004 Indian Ocean earthquake Nuclear power
1. Prehistoric Times - Beginning of the Christian Era (Black Magic) Existence of Fire Arguably the first chemical reaction used in a controlled manner was fire. However‚ for millennia fire was simply a mystical force that could transform one substance into another while producing heat and light. Fire affected many aspects of early societies. These ranged from the simplest facets of everyday life‚ such as cooking and habitat lighting‚ to more advanced technologies‚ such as pottery‚ bricks‚ and
Premium Chemistry Nitrogen Human