Life cycle of a star Stars are born in nebulae. Huge clouds of dust and gas collapse under gravitational forces‚ forming protostars. These young stars undergo further collapse‚ forming main sequence stars. Stars expand as they grow old. As the core runs out of hydrogen and then helium‚ the core contacts and the outer layers expand‚ cool‚ and become less bright. This is a red giant or a red super giant (depending on the initial mass of the star). It will eventually collapse and explode. Its fate
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INTRODUCING WITH BIOCHEMICAL CYCLES Biochemical cycles Nutrients are important for organisms to function. Each nutrient has a role in global biogeochemical cycles. A nutrient is a chemical that organisms need to live and grow and are substances an organism’s uses for metabolism which must be taken in from its environment that enrich the organism. Two types of nutrients are macronutrients and micronutrients. Macronutrients are needed in large quantities while micronutrients are needed in smaller
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Citric acid cycle From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search [pic] [pic] Overview of the citric acid cycle The citric acid cycle — also known as the tricarboxylic acid cycle (TCA cycle)‚ the Krebs cycle‚ or the Szent-Györgyi-Krebs cycle‚ [1][2] — is a series of enzyme-catalysed chemical reactions‚ which is of central importance in all living cells that use oxygen as part of cellular respiration. In eukaryotic cells‚ the citric acid cycle occurs in the matrix of the mitochondrion
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The Teaching and Learning Cycle a) Teaching and Learning Cycle The teaching and learning cycle is about how we assess and teach learners and the different stages of teaching and learning. There are four stages in the teaching and learning cycle: initial and diagnostic assessment‚ course and lesson planning‚ teaching and learning‚ and assessment and review (summative and formative assessment). Each stage is key in determining what happens in the next stage and that ‘the cycle involves a complex interweaving
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4Action of hormones in the Menstrual Cycle The Ovarian Cycle The cycle begins with the release from the hypothalamus of gonadotrophin – releasing hormone (GnRH)‚ which stimulates the pituitary to secrete small amounts of Follicle Stimulating Hormone (FSH) and Luteinising Hormone (LH). The FSH stimulates follicle growth‚ aided by LH and the cells of the growing follicles start to make estrogen. Notice in figure(d) that there is a slow rise in the amount of estrogen
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Organizational Life Cycle Organizational life can be as unpredictable as the weather‚ but it is somewhat predictable in stages of development. Like the human life cycle from birth to aging and death‚ some organizations have a comparable life cycle. Unlike the human life cycle‚ which moves for everyone through physical stages‚ the organization cycle is not inevitable. We use this metaphor to help leaders understand what can happen‚ usually as a result of inappropriate leadership. To grasp the nature
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Otto Cycle When you talk about the Brayton cycle‚ gas turbine engines should come up and when you’re talking about the Otto cycle‚ piston engines should also come up. These two cycles are the backbone of power generation. The theory of the two cycles goes all the way back to the 18th century. The Name Brayton comes from the American inventor George Brayton and Otto comes from German engineer Nikolaus Otto. Both these men changed the world and how we live life now a day. The Brayton cycle was first
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the digit transmission they provide. The third item are SMS/Text Messaging which is a voice and data communication. Text messaging is described as the exchange of short text messages. Text messages can be sent via mobile phones‚ fixed-line phone‚ and portable or fixed devices over a network. Text messaging only referred to short messages contains pictures‚ sound images‚ animation‚ and video. Fax machine which is voice communication is the fourth item to discuss; fax logic is to faxing what
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The cycle of poverty and systemic destruction of families is passed on through generations. This cycle is embedded in our society and is often times overlooked. This cycle is difficult to break; however‚ it is possible through the youth. Beginning with the youth would ultimately provide hope even when the system has been against them for so long. The cycle of poverty is defined as a long period of time where poor families are economically challenged for generations because they have very little access
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The Sexual Response Cycle Abstract Assignment: The Sexual Response Cycle •Resources: pp. 445-447 in Psychology and the Challenges of Life: Adjustment in the New Millennium •Due Date: Day 7 [Individual] forum •Review the sexual response cycle in the text. •Write a 1‚050- to 1‚400-word paper summarizing each phase of the sexual response cycle for males‚ females‚ and commonalities for both males and females. •Include a brief description of any sexual dysfunctions which can occur and common
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