Physical Properties of Organic Molecules Abstract Identifying the physical properties of compounds can be useful in several ways. It helps us to determine the structure of certain compounds‚ the purity of substances and if a substance is not pure we can figure out how to separate contaminating substances from a compound. In this experiment‚ I learned how to determine a solid’s melting point and why some melting point ranges may be broader than others.
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Life on Earth 1. Analysis of the oldest sedimentary rocks provides evidence for the origin of life. Identify the relationship between the conditions on early Earth and the origin of organic molecules. - Conditions of early Earth: Massive oceans existed Only small landmasses above the surface of the water No ozone layer Large amounts of radiation reached the Earth No free oxygen in the air Large amounts of volcanic activity; heat‚ ash‚ dust and gases into atmosphere Violent electric
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8.4 Life On Earth Students Learn About 1. Analysis of the oldest sedimentary rocks provides evidence for the origin of life • Identify the relationship between the conditions on early Earth and the origin of organic molecules Notes THE AGE OF THE EARTH - based on geological‚ magnetic‚ radiographic and paleontological studies: aged 4.5 billion years - Hadean eon: formation of earth from gaseous cloud to solid body. Heavy molten iron sank down and became the core‚ lighter rock came to surface = crust
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LIFE ON EARTH REVISION Analysis of the oldest sedimentary rocks provides evidence for the origin of life. - Identify the relationship between the conditions on early Earth and the origin of organic molecules. - Formation of the organic molecule was the first event in the evolution of life. - The molecules provided a building block for cell formation and the food for the earliest life. - Present day life’s atmosphere contains: - Oxygen - Water - Carbon
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The cosmos as we know is the essential structure and origin of the universe. The cosmos provide an understanding for how the world works. TImaeus presents a very interesting view of his idea on the structure and composition of the cosmos. Passages 28a and 28b of Timaeus accounts for Plato’s perspective on the creation of the world. As we read passage 28a… “What is that which always is and has no becoming‚ and what is that which becomes but never is?…..So whenever the craftsman looks at what is always
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Hi‚ my name is water molecule! H2O for short. I live in the bottom of a well. I come from 2 hydrogen atoms‚ but I have an oxygen atom in me! Down here in my well‚ we have a swell time together. In our liquid state‚ we are not too far apart‚ nor too packed together. It’s really great being a liquid! I feel bad for my cousin CO2. He is probably sublimating into a gas from a solid‚ or as a gas‚ freezing back into a solid. He has no melting point‚ only a freezing and boiling point. I’m SO glad I will
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human nature. Confucius believed that human nature is neither good nor evil‚ but develops through out one’s life. The actions‚ choices and thoughts of every person all contribute towards a person’s nature; and as a result of this thought he justified that there is no collective human nature and that human nature varies from person to person. This may be summed up into one phrase: “existence precedes essence”. The statement in this case would mean that people are born without any nature as
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Experiment 9 Aim A. To investigate the existence of hydrogen bonds between ethanol molecules. B. To measure the strength of hydrogen bond formed between ethanol molecules C. To investigate the formation of hydrogen bonds between molecules of ethyl ethanoate and trichloromethane. D. To measure the strength of hydrogen bond formed between molecules of ethyl ethanoate and trichloromethane. Procedure A. 1. 10 cm3 of ethanol was added into an insulated 50 cm3 beaker by
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realized the reason my melted chocolate would “seize‚” or form clumps‚ with the addition of even a drop of water was due to the hydrophobic/hydrophilic interactions between the fat molecules in chocolate and the water molecules. That I could make connections between what I study in textbooks and observe in daily life enthralled me the most. Yet biology usually doesn’t interest my peers the way it intrigues me. Sadly I can’t talk about my chocolate discovery in normal conversation‚ though I would
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The DNA molecule is often referred to as “The Blueprint of life”. Discuss. [SEP‚ 1999] Synopsis DNA structure Why is DNA called “blueprint” Features of the genetic code ------------------------------------------------------------------------------------- Deoxyribonucleic acid (DNA) is a vital component of both eukaryotic and prokaryotic cells. A blueprint is a detailed drawing or map which identifies and directs the construction and development of a building or an object. DNA is the hereditary
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