agriculture. Yet sometimes scientific discoveries may prove a curse upon the human race. As we know‚ everything has two sides. Electricity can shock one to death if used carelessly. Smoke from factories and gases from cars are terrible pollutants. Radium used in nuclear power plants can lead to a nuclear war. The misuse of scientific discoveries must be prevented. Since chemical elements or substances were discovered‚ some have been made use of for purpose of war. Such weapons as atomic bombs or poisonous
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BANDARI COLLEGE NAME: DICKSON RWEHURURU COURSE: DIPLOMA IN SHIPPING AND PORT MANAGEMENT. COURSE UNIT: ENVIROMENTAL POLLUTION AND PROTECTION. ASSIGNMENT: HOME WORK. 1. Why does air pollution from Port is a big issue. 2. Describe the main sources of Air pollution and give four specific examples in each. 3. Define marine pollution and give their effects to environment. 1
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Background In the Flame test lab we took a simple wire‚ looped it‚ and rinsed it in HCL (Hydrochloric Acid ). Then we dipped the wire in the different samples provided. The samples provided were Sodium‚Potassium‚Calcium‚ Barium‚ Strontium‚ Lithium ‚ and Copper II. Finally we put the wire loop into the flame of the bunsen burner. The flame erupted into many different colors for each specific sample. We then used the colors we recorded to find the two unknown samples given to us. But the question
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They are collectively known as the alkali metals. These are so called because they form hydroxides on reaction with water which are strongly alkaline in nature. The elements of Group 2 include beryllium‚ magnesium‚ calcium‚ strontium‚ barium and radium. These elements with the exception of beryllium are commonly known as the alkaline earth metals. These are so called because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth’s crust*. Among the alkali
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Personal Portrait of Erik Erikson’s developmental theory and Kohlberg’s model of moral development Theory of Development Erik Erikson is best known for theories of personality development. His theory details the impact of social experiences across a person’s whole life span. He believes that everyone’s personality develops in a series of stages. There are conflicts that a person experiences in each stage that helps them be successful or fail. The conflicts make a person have personal growth
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Women change the world “A woman is like a tea bag- you never know how strong she is until she gets in hot water”‚ these were the well said words of former US first lady and leading feminist Eleanor Roosevelt. How many women do our lives comprise of‚ how many have we thanked. The daughters‚ the mothers‚ the sisters‚ the fribblings – friends like siblings‚ the wives‚ the aunts‚ the nieces‚ the grand-some things‚ the young uns‚ the teens. The women in our lives. Who love‚ lose‚ cry. Laugh‚ heal‚
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powder Spatula Universal Indicator Thermal mat Filter paper Safety: Wear eye protection. Magnesium and calcium are highly flammable. Calcium hydroxide is an irritant. Group 2 elements Calcium Strontium Magnesium Beryllium Barium Radium Introduction: The Group 2 elements are all metals with a shiny‚ silvery-white colour having 2 electrons in their outermost shell. The alkaline earth metals are high in the reactivity series of metals‚ but not as high as the alkali metals
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For many decades‚ HeLa cells have helped scientists develop many achievements in vaccination‚ mapping chromosomes‚ and even cloning. HeLa derived from the first two letters of the first and last name of Henrietta Lacks. These cells were taken from her in the 1950’s without her or her family’s knowledge. Only twenty years after her death did they discover its’ existence. Living as African American women of lower economic status during Henrietta’s time compared to life now are very different lifestyles
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If mendel test crossed did he not think it would affect the outcome of his results? I was Who was Gregor Mendel‚ Key terms. Gregor Mendel was an Austrian monk in 1865‚ he called gene factors. He is known as the father of genetics but in his time his work was not widely accepted because people felt he tweaked his results they seemed too good. Key terms: Genotype the symbolic representation of pairs of alleles Phenotype the characteristics or traits of an organism Dominant allele An allele that
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The Progress of the Atomic structure Different theories about the atomic structure were introduced over time. These theories changed as a result of development of different experiments. Leucippus was the first to introduce the theory of atomism‚ however he didn’t write about his theories in detail. However‚ Democritus‚ his student wrote about the theory of atoms in detail. He theorised that everything was composed of atoms and that atoms are solid and indestructible. He also had a theory that
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