Sruthy

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This document welcomes Sruthy Sreenivas to Mount Tabor Training College with a registration number of 13303026 and notes they are studying Natural Science. It then lists the topics of Nutrition, Carbohydrate and Lipid.

WELCOME
SRUTHY SREENIVAS
NATURAL SCIENCE
REG.NO. : 13303026
MOUNT TABOR TRAINING COLLEGE
PATHANAPURAM

This PowerPoint presentation discusses the six main nutrients needed for human survival and growth: carbohydrates, proteins, lipids, vitamins, minerals, and water. Carbohydrates provide the main source of energy, proteins are used for building body tissues, and lipids contain twice the energy of carbohydrates and proteins. Vitamins and minerals regulate life activities, with vitamins being organic compounds and minerals including calcium, phosphorus, sodium, and potassium needed in large quantities. Water makes up 70% of the human body and is obtained through direct intake and in food.

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This document is an introduction to a lesson plan about native and hybrid plant varieties presented by Seetha Lekshmi for a Natural Science class at Kerala University College of Teacher Education in Kollam, India. The objectives of the lesson are to make students aware of native and hybrid varieties, observe pictures of different varieties, develop process and life skills, and understand the importance of native and hybrid varieties. The lesson will discuss topics like conservation of native varieties, biodiversity, advantages and disadvantages of native and hybrid varieties, and importance of conservation.

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This power point presentation discusses a diagram with points labeled A, B, C, etc. and lines connecting the points. It explains how to identify the relationships between the points based on the connections. Specifically, it analyzes the connections between points F, E, B, D, and C. It determines that F, C, B, E, and A, D are the lines of relationships. It concludes that the point determined by the intersection of these lines of relationships is the central point of the diagram.

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This document discusses different types of fruits, including false fruits which include parts other than the ripened ovary, simple fruits which develop from a single ovary, multiple fruits which are formed from a cluster of flowers, and aggregate fruits which develop from the merger of several ovaries. It also mentions fleshy fruits which have flesh between the seeds and skin, and dry fruits which have had most of their water content removed.

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Earthquakes are caused by the release of stored energy in the earth's interior. The point of origin is called the focus, and the point directly above on the surface is the epicenter. Energy from the focus propagates as seismic waves that cause tremors and destruction. The Richter scale is used to measure an earthquake's magnitude based on the intensity of shaking and damage. Primary and secondary body waves travel through the earth's interior at different speeds depending on the material's density, while surface waves cause surface destruction as they travel along the earth's surface.

This document discusses tsunamis. It defines tsunamis as unusually large sea waves that can be caused by intense earthquakes under the sea. While tsunami waves can travel thousands of kilometers over sea without harm, when they reach land they have the potential to cause widespread devastation. The document specifically references the 2004 Indian Ocean tsunami that originated on December 24th, killing over 200,000 people due to the enormous energy released by the earthquake, estimated to be 23,000 times greater than the bomb dropped on Hiroshima.

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This document discusses the structure of atoms. It states that all matter is made up of atoms, which are the smallest particles that can engage in chemical reactions. Atoms have a central nucleus containing positively charged protons and uncharged neutrons, and electrons orbiting the nucleus. Rutherford discovered the nuclear model of the atom through deflecting alpha particles with a gold foil. The document also discusses Bohr's model of electron shells and energy levels in atoms, as well as the composition of protons, neutrons, and electrons that define atomic number and mass number.

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This document discusses the environmental pollution problems in Kuttanad, Kerala. The construction of the Thaneermukkam bund affected the natural flow of water in the Vembanad Lake, causing stagnation. Chemical fertilizers and pesticides then flowed into the stagnant backwaters, polluting the water. This led to overgrowth of invasive African weeds in the backwaters, adversely impacting the natural environment. The spread of weeds made travel by boat and canoe difficult and coconut husk soaking also contributed to pollution. Blocking the entry of saline water decreased populations of river and sea prawns.

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The nitrogen cycle involves the transformation of nitrogen between its various chemical forms and exchanges between the atmosphere, soil, plants, and animals. Nitrogen enters the soil through decomposition, is converted to ammonium then nitrates by microbes, taken up by plant roots, and either remains in plant tissue or enters the food chain when consumed by animals. It can return to the atmosphere through denitrification by soil bacteria or industrial fixation through the Haber process. Anthropogenic activities such as agriculture and fossil fuel combustion have significantly impacted the global nitrogen cycle.

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This document discusses key concepts in ecology including biotic and abiotic factors, ecosystems, levels of ecological organization, biomes, niches, habitats, and relationships between organisms such as symbiosis, predator-prey interactions, parasitism, commensalism, and mutualism. Food chains and food webs are also covered, explaining how energy and matter are transferred between organisms in an ecosystem from producers to primary, secondary, and tertiary consumers. Maintaining biodiversity through complex food web interactions is important for ecosystem stability.

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Electromagnetism is one of the fundamental forces in nature and results from the interaction between electricity and magnetism. Originally considered separate forces, experiments by Hans Christian Ørsted and discoveries by James Clerk Maxwell unified electricity and magnetism. Ørsted observed that electric currents could produce magnetic fields, representing a direct relationship between electricity and magnetism. Maxwell's 1873 treatise further developed this relationship and established electromagnetism as a single force. Today, electromagnetism has many applications in technologies like electric motors, generators, and transformers.

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Nitrogen is essential for plant growth but it is not readily available to plants in its atmospheric form. The nitrogen cycle involves nitrogen-fixing bacteria converting atmospheric nitrogen into forms plants can use through processes like nitrogen fixation. When organisms die and decay, nitrogen is released back into the soil and atmosphere through mineralization, allowing the nitrogen cycle to continue providing this important nutrient to plants.

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