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Chapter 16

Climate Change

what is climate change a large change in the climate records of temperature, rainfall, wind speeds, etc., lasting decades or longer
how do people research weather from pre-1900 frozen ice cores
what is the average global temperature increase called Global warming
what are three natural causes of climate change Changes in the sun's intensity Slow changes in the earth's orbit around the sun Volcanic eruptions
explain how the change in the suns intensity causes climate change the more dark sunspots on the sun the more energy than normal is coming from the sun, the sun has a sunspot cycle where it goes from maximum sunspots to minimum sunspots in 11 years
how do the slow changes in the earths orbit around the sun affect climate change the earths orbit is sometimes a circle and sometimes an ellipse, the earths axis tilts sometimes and sometimes it wobbles like a spinning top. these three changes have an impact on the amount of sunlight that the earth receives
how do volcanic eruptions effect climate change erupting volcanoes emit sulphur dioxide into the atmosphere. the sulphur dioxide combines with water to form sulphuric acid. the sulphuric acid makes tiny droplets that reflects radiation from the sun, causing cooling of the earths surface
Name two factors of climate change caused by human activity Greenhouse effect Greenhouse gasses
explain the greenhouse effect During the day the earths surface warms up and cools during the night releasing the heat back into the air, some heat however gets trapped by greenhouse gases in the atmosphere, over time humans have created too much greenhouse gases too little heat escap
name the three main greenhouse gases thhat humans emit Carbon Dioxide (CO2) Methane (CH4) Nitrous Oxide (N2O)
how is Carbon Dioxide emitted Burning fossil fuels Deforestation
how is methane emitted fossil fuels being extracted from the earth Animals such as cows fart Landfills, decomposing solid waste Biofuels e.g. crops
how is nitrous oxide emitted Artificial fertilisers widespread use of coal as power station fuel
name the 4 implications/consequences of climate change Melting ice and Rising seas Extreme Weather Events (Droughts, floods, heatwaves) Desertification Threats to wildlife
Explain melting ice and rising sea levels when water warms up it expands. at the same time, global warming causes ice sheets to melt. the combination of these is causing sea levels to rise, resulting in flooding and erosion of coastal areas. many fresh water supplies have become contaminated
what was the climate agreement in Paris 2015, 195 countries signed a global climate deal to put the world on track to avoid dangerous climate change by limiting global warming well below 2 degrees Celsius
Created by: JMahango
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