RFCC UNIT CHEMICAL USE AND PREPARATION 1. LIQUID PHOSPHATE (Water treatment) External treatment: Reduction and removal of impurities from water outside the boiler. In general, external treatment is used when the amount of one or more of the feedwater impurities is too high to be tolerated by the boiler system in question. (e.g. softening, deaeration, evaporation) Internal Treatment: Is the conditioning of impurities within the boiler system. Its purpose is to properly react with
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6 Cellular Respiration: Obtaining Energy from Food Muscles in action. Sprinters, like all athletes, depend on cellular respiration to power their muscles. CHAPTER CONTENTS Energy Flow and Chemical Cycling in the Biosphere 92 Cellular Respiration: Aerobic Harvest of Food Energy 94 Fermentation: Anaerobic Harvest of Food Energy 101 CHAPTER THREAD Aerobic versus Anaerobic Lifestyles BIOLOGY AND SOCIETY Marathoners versus Sprinters THE PROCESS OF SCIENCE What Causes Muscle Burn? EVOLUTION
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the form of energy that is present in pizza that we eat? A) Mechanical B) Chemical C) Radiation D) Electrical Which of the following is not a unit of energy? A) Joules B) Meters C) BTU D) Calories What is the energy stored in the bonds that hold molecules together called? A) Chemical B) Kinetic C) Nuclear D) Thermal Which of the following is the process of breaking a large nuclei into two intermediate size nuclei? A) Chemical reaction B) Nuclear fusion C) Nuclear fission D) All of the above A woman
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it to help limit any changes to an individual's body temperature in a certain environment. For example the release of heat when the surrounding temperature is higher than body temperature • Elimination of waste' Urea – Urea is an organic molecule made up of carbon, nitrogen, oxygen, and hydrogen. Urea is a common constituent of blood and other various bodily fluids, and is formed from ammonia in the kidney and liver. Ammonia is produced through the breakdown of proteins during tissue metabolism
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Aristotle (384—322 B.C.E.) Aristotle is a towering figure in ancient Greek philosophy, making contributions to logic, metaphysics, mathematics, physics, biology, botany, ethics, politics, agriculture, medicine, dance and theatre. He was a student of Plato who in turn studied under Socrates. He was more empirically-minded than Plato or Socrates and is famous for rejecting Plato's theory of forms. As a prolific writer and polymath, Aristotle radically transformed most, if not all, areas of knowledge
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Bilateral Ipsilateral Contralateral Proximal Distal Superficial Deep Body Sections Sagittal Transverse (horizontal) Frontal (coronal) Body Regions See Figure 1.17 Chapter Two Chemistry Matter Element Major elements Carbon Oxygen Hydrogen Nitrogen Atom Subatomic particles Protons Neutrons Electrons Atomic number Atomic weight Isotopes Chemical bonds Ionic bonds Covalent bonds Polar Nonpolar Hydrogen bonds Chemical reactions Synthesis
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known as the Ozone layer. Chemically ozone gas with a formula (O3) is formed from molecular oxygen (O2) in the stratosphere at an attitude of about 25km by the action of ultraviolet frequency photons .The formula O3 for ozone gas means the ‘’ozone molecules consists of three actions of oxygen arranged in the shape of wide V’’ .Scientific research also indicate that the ‘’name ozone is derived from the Greek word ozein, which means to smell or reek’’. THE IMPORTANCE OF OZONE LAYER TO THE ENVIRONMENT
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SYLLABUS Cambridge IGCSE® Combined Science 0653 For examination in June and November 2015 Cambridge Secondary 2 Changes to syllabus for 2015 This syllabus has been updated. Significant changes to the syllabus are indicated by black vertical lines either side of the text. Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However, we cannot give permission
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defense against viruses; associated with chronic infections. Answer: D Diff: 1 Page Ref: 659‐660 Match the following: 15) The major contributor to plasma osmotic pressure. Answer: C Diff: 1 Page Ref: 648 16) Thrombin catalyzes the joining of these molecules present in plasma. Answer: A Diff: 1 Page Ref: 666 A) Fibrinogen
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disorder is only slightly lower than the toxic dosage. The metal lithium is not essential for any biological functions, but was found to exist in extremely tiny quantities in umbilical cord blood. While it is considered a non-essential trace element (an element needed in extremely tiny amounts for proper growth), lithium also has medicinal uses. A double-blind, placebo-controlled, two-week long study conducted by a group of doctors on severely depressed patients proved that lithium is a key component
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