The speed of chemical reactions – class experiment By Julia Shuker Year 10 science – Miss Phillips – Term 2 – 2013 – Julia Shuker Aim The aim of the experiment was to investigate the factors that increased or decreased the speed of chemical reactions between two different chemical reactions. Hypothesis If certain factors‚ such as concentration‚ temperature‚ catalyst and surface area are increased then the reaction rate will also increase due to the particles
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June 2010 The hazards presented by volcanic and seismic events have the greatest impact on the world’s poorest people.” To what extent do you agree with this view? PLAN: 1. What is a hazard- volcanic hazards include tephra‚ lava‚ pyroclastic flows‚ volcanic bombs and seismic hazards include earthquake‚ tsunami‚ liquefaction‚ landslides 2. Human issues- proximity to lowland coast‚ ability to adapt to change‚ socioeconomic effects‚ impacts within a community‚ difference in rich and poor‚ urban and
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earthquakes. In fact‚ 62 A.D. marks the date of a very large precursor earthquake. Because earthquakes happen so frequently‚ there are‚ consequently‚ related volcanic eruptions. Mount Vesuvius is a composite volcano. This type of volcano has many layers of lava and ash. There are two kinds of eruptions. A composite volcano like Vesuvius will erupt with two kinds of eruptions‚ but never at the same
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Steven Hermosillo Professor Hulsey Fire Tech 107 15 November 2015 Hydrogen Peroxide According to Lee Lerner‚ (2008)‚ “Hydrogen Peroxide is most widely found in homes in brown bottles containing three percent solutions (3% hydrogen peroxide and 97% water).” Lee Lerner (2008) writes “Hydrogen Peroxide is a colorless liquid that mixes with water and is widely used as a disinfectant and bleaching agent.” Hydrogen Peroxide is used in many different ways and has different hazards. “Hydrogen peroxide is
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the earth’s core. As the convection currents move the plates away from each other‚ there is a weaker zone in the crust and an increase in heat near the surface. The hotter‚ expanded crust forms a ridge. Magma rises up from the mantle in the gap. The lava cools‚ solidifies and forms a chain of volcanic mountains thousands of miles long down the middle of the ocean eg. Atlantic. There are transform faults at right angles to the ridge. The movement of these faults causes rift valleys to occur. Examples
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Yes What evidence did you use to decide that something was a chemical change? I observed during the application of the hydrochloric acid to some of the substances bubbling‚ and smoking Give at least two examples of chemical changes you observed. Green changed from blue to application of HCL to Mg smoking and bubbling and CuCO3 Classify the following properties of sodium metal as physical or chemical: • Silver metallic color: Physical • Turns gray in air: Chemical • Melts
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John Abarshi Mr Meinsma Chemistry December 14‚ 2010 Conductivity of Ionic solutions Introduction This lab report is about the conductivity of ionic solutions. In class we have been discussing wether all ionic solutions conduct equally well. If an solvent solution conducts electricity‚ then it must contain ions. So measuring the conductance of solutions can tell you whether the solutes in the solution are dissociated into ions. (Conductivity) Any type of solution‚ even ionic solutions‚ provide
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What causes a volcanic eruption? When a part of the earth’s upper mantle or lower crust melts‚ magma forms. A volcano is essentially an opening or a vent through which this magma and the dissolved gases it contains are discharged. Although there are several factors triggering a volcanic eruption‚ three predominate: the buoyancy of the magma‚ the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber. What follows is a brief description
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Volcanoes are generally not preserved in the geologic rock record as they are usually eroded away. However‚ the various materials erupted from volcanoes are often found preserved in the rock record. From what you have learned about the different types of volcanoes‚ how could you infer what type of volcano erupted in a given area based on the type of volcanic deposits now found as layers of rock? Give specific examples‚ and briefly discuss how some materials may be linked to different types of volcanoes
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Fahrenheit. When the plant is emerged the female lays her eggs at the bottom of the corn stocks. They take around four weeks to emerge to the pupate stage based on the temperature and degree-days. They feed like the other two-corn rootworm‚ the lava stage feds on the roots of the plant and the adult’s feds on the crop’s leaves‚ silks‚ and
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