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GCSE GEOGRAPHY ASSESSMENT

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Introduction

GCSE Geography Assessment October 2008 Climate Change 1. What is global warming? Global warming refers to the gradual increase of the Earth's average surface temperature which in turn causes changes in climate. The Greenhouse effect is causing global warming because 'greenhouse gases' are being emitted into the atmosphere trapping additional heat. Warming the Earth may lead to changes in rainfall patterns, impacts on living organisms and a rise in sea level. The increase of the Earth's surface temperature is only an average because different parts of the world have been affected by global warming and climate change differently. Over the last 100 years, the Earth has warmed up by about 0.6 degrees Celsius and scientists believe that human activities are helping Global warming. 2. Explain how the greenhouse effect works, Use a diagram to help. The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere are trapping energy from the sun. Without these gases, heat would escape back into space and the Earth's average temperature would be about 60 degrees Fahrenheit less. These gases are referred to as greenhouse gases because of the way they warm the Earth. There are quite a few greenhouse gases and water vapour, carbon dioxide, nitrous oxide and methane are the main ones. ...read more.

Middle

Using map 1 and the two graphs describe the evidence that suggests that 'global warming' is taking place. Map 1, Graph 1 and Graph 2 all show that 'global warming' is taking place. Map 1 shows the Greenland ice sheet in two different periods of time. The dark areas on the ice sheet show the areas where the ice had melted. The first photo was taken in 1992 and the second was taken in 2002. There is a clear difference in the amount of ice melted between the two photos. In 1992, there was only a small amount of melted ice towards the southern area whereas in 2002, ice had melted all around Greenland. The map clearly shows the evidence that 'global warming' is causing the ice to melt. Global Warming is the average increase in the world's temperature. Scientists have recorded and analysed temperatures around the globe and have discovered that the temperature is increasing at a higher rate for Greenland, the Arctic and Antarctica. Ice is now being lost from the islands at a rate of 5 cubic miles a year and it is causing global sea levels to rise 0.02 inches a year. If all the ice in Greenland were to melt, scientists have estimated that global sea levels would rise by 23 ft. ...read more.

Conclusion

* By installing 180mm thick loft installation, you could stop about 25% of heat escaping through the roof. Loft installation is one of the most efficient ways of reducing your household carbon footprint. It is also easy to install. Appliance Usage Per use Cost per year Kg carbon dioxide per year Microwave Oven 96 times per year 0.945 kWh per use( based on 1.39 kWh for full power and 0.5 kWh for defrosting) �9.07 39 Washing Machine 187 washes per year EU energy label A-rated gives an average consumption at 40�C using a 2kg load to be 0.63 kWh �11.78 51 Electric Tumble Dryer 148 uses per year 2.50 kWh per cycle Based on an average load capacity of 4.76 kg of dry laundry �37.00 159 Kettle 1542 uses per year 0.11 kWh per use based on heating 1 Litre of water �16.90 73 Gas Oven 135.1 uses per year 1.52 kWh per use �7.60 38 Electric Oven 135.1 uses per year 1.56 kWh per use �21.08 91 Dishwasher at 65�C 135 uses per year 1.44 kWh per use �19.44 84 Fridge-Freezer A ++ spec 24 hours a day 206 kWh per year �20.60 89 Fridge-Freezer A+ spec 24 hours a day 270 kWh per year �27.00 116 Fridge-Freezer A spec 24 hours a day 408 kWh per year �40.80 175 ...read more.

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