Chemistry has been called the science of what things are. Its intent is the exploration of the nature of the materials that fabricate our physical environment‚ why they hold the different properties that depict them‚ how their atomic structure may be fathomed‚ and how they may be manipulated and changed. Although organic reactions have been conducted by man since the discovery of fire‚ the science of Organic chemistry did not develop until the turn of the eighteenth century‚ mainly in France at
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Photosynthesis Green plants absorb light energy using chlorophyll in their leaves. They use it to react carbon dioxide with water to make a sugar called glucose. The glucose is used in respiration‚ or converted into starch and stored. Oxygen is produced as a by-product. The equation for photosynthesis: Carbon Dioxide + Water (+ Light Energy) → Glucose + Oxygen Symbol equation: 6CO2 + 6H2O ------> C6H12O6 + 6O2 (http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/plants/plants1
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INORGANIC CHEMISTRY – CLASS XI (ISC) Properties of Group 1 elements [Alkali metals] 1. Due to high reactivity‚ alkali metals do not occur free in nature. Elements of group 1 (or IA) are known as alkali metals because their hydroxides are soluble in water and form strongly alkaline solutions. Alkali metals are stored under kerosene oil because they get tarnished on exposure to air. 2. The general electron configuration of alkali metals is ns1. 3. Alkali metals have largest size and lowest
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Atmosphere –Water Interactions C. P. Huang Stumm W. and J. J. Morgan. Chapter 5. Aquatic Chemistry 1 Environmental Systems 2 5.2 Atmospheric generation of acidity 3 Genesis of acid rain 4 Chemical processes and Chemical Composition of Water Droplets 5 uM ueq/L NO360 60 SO4244 88 Cl 25 25 S(X) 173 Mg2+ 4.5 9 Ca2+ 16 32 NH4+ 85 85 K+ 2 2 Na + 5 5 H+ 50 50 S(M) 183 CH3COOH 5 5 6 7 8 Total Annual
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Is physical appearance important? Why is appearance so important? Attractiveness and positive personality traits cluster This is termed the “halo effect” Attractive people are: The importance of physical appearance in animals: Long-tailed Wydah (Andersson 1982) The importance of physical appearance in humans:Newborns prefer to look at attractive faces (Slater et al 1998) At 6 month can categorise faces as attractive (Ramsey et al 2004) Studies show that physical
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could be thought of as a wave possessing a characteristic wavelength. Example. Calculate the wavelengths of the following objects. (a) a baseball weighing 142 g thrown at 142 km/h. (b) a helium atom moving at a speed of 8.5 x 105 m/s. The importance of the above example...... CH 5-2-3 The
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Memory Structures Sensory memory is the shortest-term element of memory. It is the ability to retain impressions of sensory information after the original stimuli have ended. It acts as a kind of buffer for stimuli received through the five senses of sight‚ hearing‚ smell‚ taste and touch‚ which are retained accurately‚ but very briefly. For example‚ the ability to look at something and remember what it looked like with just a second of observation is an example of sensory memory. The stimuli detected
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THE WONDERFUL HYGENIC WORLD OF SHAMPOO Everyone who uses shampoo could tell you that their main factors in choosing a shampoo to use are smell‚ look‚ and price. People are misinformed about shampoo and how to tell the difference between a good shampoo and a bad one. The main point of shampoo is to cleanse your skull of residue that is picked up either from hair products such as hair spray‚ gel or moose‚ as well as the dirt in the air‚ and perspiration. Shampoo is something that all of us use on
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Is psychology a science? Psychology being categorised under the name science‚ can often lead to disputes within the field of sciences. Psychology is the observation of behaviour and thought process of the human mind‚ within itself it is a vital source of knowledge‚ such as how biology‚ chemistry and physics provides a source of knowledge that is vital to humans and the environment. Science can be seen as the study of natural behaviours and physical aspects of the world‚ this definition within itself
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A scientific‚ applied‚ and interdisciplinary field. Developmental psychology is the scientific study of age-related changes throughout the human life span. Human development is a field of study devoted to understanding constancy and change throughout the lifespan. The investigators who study human development have a single goal: to describe and identify those factors that influence consistencies and transformations in people from conception to death. Basic
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