2011 Syllabus 5070 Paper 21 A1 Allow correct name but formula takes precedence (a) V2O5 (1) (b) ZnSO4 (1) (c) AgI (1) (d) CF3Cl3 (1) (e) (NH4)2SO4 / ZnSO4 (1) (f) CH4 (1) (g) (NH4)2SO4 (1) [1] [1] [1] [1] [1] [1] [1] [Total: 7] A2 (a) sulfur dioxide (1) Allow SO2 (b) copper(II) sulfate (1) Allow CuSO4 (c) H+ + OH– → H2O (1) Ignore state symbols (d) (i) Copper(II) hydroxide (1) Allow Cu(OH)2 (ii) Cu2+(aq) + 2OH–(aq) → Cu(OH)2(s) Balanced equation (1) Correct state symbols (1) [1] [1]
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no longer exist due to the amount of carbon dioxide being emitted into the atmosphere. The excess of carbon dioxide is creating a blanket-like cover that is disrupting the proposed cycle. Ice ages occur when the ocean and vegetation absorbs the carbon dioxide from the atmosphere. As the carbon dioxide is removed from the atmosphere‚ the temperature drops drastically; however‚ the ocean and vegetation is proven unable to absorb the amount of carbon dioxide fast enough to keep up with the previous
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www.croll.com Trees are one of the most important aspects of the planet we live in. Trees are vitally important to the environment‚ animals‚ and of course for us humans. They are important for the climate of the Earth‚ as they act as filters of carbon dioxide. Forests are known as habitats and shelters to millions of species. However‚ the trees on our planet are being depleted at a very fast rate. According to some estimates‚ more than 50 percent of the tree cover has disappeared due to human activity
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Celsius. With the emerging trends of continuous carbon emission‚ scientists claim that temperature is expected to increase from 1.4- 5.8 degrees Celsius. Global warming is confirmed to be a fundamental threat to living creatures on earth. According to the reports by the scientists‚ global warming has significantly increased over the past centuries. Climate changes have been caused by technological inventions. There has been an increase of carbon emission in the atmosphere since industrial revolution
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photosynthesis is a chemical reaction and chemical reactions increase with temperature. But at temperatures above 40 C the rate slows down because the enzymes involved are destroyed at high temperatures. The higher the concentration of carbon dioxide‚ the greater the rate of photosynthesis. Economics of greenhouses Farmers can use their knowledge of factors limiting the rate of photosynthesis to increase crop yields. This is particularly true in greenhouses‚ where the conditions are
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for the most part could have easily been recycled. This is eating away at our ozone layer which protects us from the sun that at its core burns twenty-seven million degrees Fahrenheit and in return we are seeing melting ice caps which stores carbon dioxide‚ a gas trapped within them and is being released into our atmosphere‚ thus causing sea levels to rise at an even greater rate. We are cutting down the trees that naturally take in our waste product so it will not aid in diminishing us as a race
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Carbon Dioxide Production of Yeast in Different Sucrose Solutions Internal Assessment Azayleah Delgado October 27‚ 2013 Period 2 Carbon Dioxide Production of Yeast in Different Sucrose Concentrations Raw Data Tables: Sucrose concentration (%) Volume of CO2 captured (mL) 0 minutes 5 minutes 10 minutes 0 4.5 4.5 5.0 2.5 4.0 4.5 4.5 5 4.0 4.0 4.5 7.5 4.0 4.5 4.5 10 3 3.5 3.5 Table 1: Trail 1 of Volume of CO2 captured by sucrose concentration Sucrose concentration
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global warming is primarily caused by humans and it began during the Industrial Revolution. Throughout the Industrial Revolution the production of burning fossil fuels increased drastically. The burnt fossil fuels began releasing large amounts of carbon dioxide‚ and artificial chemicals called halocarbons harming the environment. Scientists have concluded that most of the observed warming is very likely due to the burning of coal‚ oil‚ and gas. This conclusion is based on a detailed understanding of
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conscious of their consumption choices. Global warming is based on the notion that the earth temperatures are increasing due to human activities such as burning fossil fuels. The increase in temperatures is caused by the increasing emission of carbon dioxide‚ CO2‚ into the atmosphere that is associated with trapping heat hence the greenhouse effect. According to Maslin (2007)‚ human activities that include burning of fossil fuels are the main causes of global warming in our planet. The effect of increasing
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“The Effects of Negative Human Interaction on the Environment” This essay will discuss the two prevailing theories regarding the effects that humans have on their environment. One of these theories describes negative human interaction as harmless. The other views them as the main reason for the degradation of our planet. I will define both points of view and lay out the arguments of each. I will finally argue that there is enough evidence to prove that humans are indeed responsible for the decay
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