Class – IV Social Studies MM-50 Q1. Name the type of forest to which the following trees belong: __ / 5 Tree Type of forest ___________________________ Ebony tree ___________________________
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that metals are mostly a solid phase and that they come in a more variety of colors. Metals are really good conductors of electricity and have a metallic luster. Metals also can be ductile‚ and malleable. We can also conclude that nonmetals can be a solid‚ liquid‚ or gas. Nonmetals are a poor conductor of electricity (good insulators) and have no metallic luster. Nonmetals are also not ductile or malleable. From this lab I have also concluded that semimetals have properties like metals and nonmetals
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Chemistry Practical Report: Period 3 Elements Name: Titus Lee Date: 12th February 2014 Partners: Louella Jarillas‚ Vevaan Nguyen‚ Alexandro Francisco‚ Alif Ahmed Aim: To examine the similarities and differences between the properties of a selection of the elements of Period 3 Hypothesis: Sodium will be the most reactive element and sulphur will be the least reactive Equipment and Method: Found on Page 28-9 in Heinemann Chemistry 1 Student Workbook Results: Element Observations Element
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elements. A mineral such as quartz may be colorless‚ or have various colors. By observing the color‚ it can be determined if the mineral is mafic or felsic; dark or light. Luster is observing the sample for metallic or non-metallic properties. If metallic‚ it will reflect light‚ like gold; if non-metallic‚ it can be glassy‚ pearly or dull. If Exhibit A is used to draw a line over a pavement‚ the mineral powder left behind would be referred to as the streak. This can be the color of the rock itself or different
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adds to the extreme power of the car. Not only is the performance of the Camaro wonderful‚ but the style of this car is beautiful as well. It is offered in many colors such as Arctic while‚ Sebring Silver‚ Light Pewter Metallic‚ Black Hugger Orange‚ Bright Blue Metallic‚ Bright red‚ Mystic
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Chelation Therapy 1. Chelation is a process by which a chemical substance is utilized by doctors‚ to bind with metallic molecules or minerals and therefore aid in their removal from the body. Chelation is widely used to expel excess or toxic substances metals from the body before they can cause any damage to the body. Chelation Therapy works on the principle that when a complex amino acid called Ethylenediaminetetraacetic acid (EDTA)‚ comes into contact with various positively charged heavy
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properties: they are usually shiny (they have metallic luster)‚ have a high density‚ are ductile and malleable‚ usually have a high melting point‚ are usually hard‚ are usually a solid at room temperature and conduct electricity‚ heat and sound well. While there are several metals that are low density‚ soft‚ and have low melting points‚ these (the alkali and alkaline earth metals) are extremely reactive‚ and are rarely encountered in their elemental‚ metallic form. The electrical and thermal
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absolute zero - a theoretical condition concerning a system at zero Kelvin where asystem does not emit or absorb energy (all atoms are at rest) accuracy - how close a value is to the actual or true value; also see precision acid - a compound that‚ when dissolved in water‚ gives a pH of less than 7.0 or a compound that donates a hydrogen ion acid anhydride - a compound with two acyl groups bound to a single oxygen atom acid dissociation constant - an equilibrium constant for the dissociation of
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Sunglasses are eyewear designed to help protect the eyes from excessive sunlight. Eyes are extremely light sensitive and can be easily damaged by overexposure to radiation in the visible and nonvisible spectra. Bright sunlight can be merely a distracting annoyance‚ but extended exposure can cause soreness‚ headaches‚ or even permanent damage to the lens‚ retina‚ and cornea. Short term effects of sun overexposure include a temporary reduction in vision‚ known as snow blindness or welders’ flash. Long-term
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First‚ prepare a data table. Record what you see throughout the laboratory activity. Your teacher will demonstrate for the class the reaction of metallic copper with concentrated nitric acid‚ HNO3. This must be done in the fume hood. (Caution: Avoid breathing poisonous gases. Avoid contact of skin with nitric acid. It burns skin and clothing.) One student will be asked to feel the side of the demonstration beaker and report to the group. The products formed are copper(II) nitrate solution‚ Cu(NO3)2(aq)
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