C13 PPQ mistakes
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explain how greenhouse gases cause global warming
• sun emits short wavelength radiation • which enters the atmosphere • earth absorbs and re-emits them as longer wavelength radiation • which is absorbed by greehouse gases in the atmosphere • increasing the temperature leading o global warming
Explain how trees reduces global warming
• trees use carbon dioxide • for photosynthesis • carbon dioxide causes global warming
Explain why the carbon footprint of cars are not just the CO2 emission during use
• CO2 is released when extracting and processing raw materials • during manufactuing • and disposal at the end of its useful life
describe how coal was formed
• CO2 is used during photosynthesis • by trees • which die and are compressed • over millions
Combustion of 1kg coal produces more CO2 than 1kg of natural gas why?
Higher percentage of coal
Describe the change of CO2 levels
4.4 - 2.7 billion years • decreased • water vapour condensed into water to form oceans • carbon dioxide dissolves into oceans • carbonates precipates • sedimentary rocks formed 2.7-1.7 billion • decreased • algae and plants appeared • they photosynthesise • coal and fossil fuels formed • sedimentary rocks formed 100-200 years • industrail revolution • human activity • burning fossil fuels
What is locked up carbon
• carbon dioxide that was in the earths early atmosphere • Formed sedimentary rocks or fossil fuels
why are many scientsists are concenered about carbon dioxide being released
• CO2 is a greenhouse gas • Increases the earth temperature • Which raises sea levels and causes flooding
How is carbon dioxide released into the atmosphere by human activity
• Burning fossil fuels • Cattle farming/rice fields • Deforestation
two issue caused by sulfur dipxide
• acid rain • respiratory issues
how is sulfur dioxide formed in transport
• when fuel with sulfur impurities • is combusted in engines and oxidised
how is carbon monoxide produced by transport
• fossil fuel burned • incomplete combustion
How is natural gas formed
• planton died • buried under sediments • high pressure • high temperature • million of years
Why does an increases in world population increases conc. of CO2
• More energy required • more fossil fuel burned • more farmland • more deforestation
Effect of global warming
• melting ice • rising sea levels • flooding • extreme weather • loss of habitat