Climate change 0.0 / 5 ? GeographyClimate changeGCSEAQA Created by: cupcakemo155Created on: 10-02-20 19:55 What are recent evidence of climate change? Shrinking Glaciers and melting ice / Rising sea levels / Seasonal changes 1 of 20 What are natural causes for Climate change? Orbital changes / Solar activity / Volcanic activity 2 of 20 What are Milankovitch cycles? 3 distinct cycles of the earth's tilt - Eccentricity / Axial tilt / Procession 3 of 20 Who created Milankovitch cycles? Milutin Milankovitch, a Serbian geophysicist and astronomer 4 of 20 What is the Eccentricity cycle? The earth's tilt changing from circular to elliptical, takes 100,000 years 5 of 20 What is the Axial tilt cycle? The earth's tilt changing from 23.5 degrees to 21.5 and 24.5 degrees, over 41,000 years 6 of 20 What is the Precession cycle? The earth 'wobbles' causing very long days and very long nights, takes 26,000 years 7 of 20 What is a sunspot? it's a dark patch that appears of the surface of the sun 8 of 20 What is the sunspot cycle? The number of sunspots increases and decreases over a period of 11 years 9 of 20 What happens when there is an increased amount of sunspots? The sun gives off more heat, causing solar flares 10 of 20 What happens when there is a decreased amount of sunspots? The sun's solar output is reduced, leading to lower temperatures on Earth 11 of 20 What does volcanic activities release into the air? huge quantities of ash, gases and liquids 12 of 20 What is a short-term effect of volcanic eruptions? Volcanic ash can block the sun, reducing temperatures on earth 13 of 20 What is a long-term effect of volcanic eruptions? Fine droplets of sulphur dioxide can convert to sulphur acid which reflects radiation from the sun for years 14 of 20 What are greenhouse gases? Carbon dioxide, Methane and Nitrous oxide 15 of 20 How do humans release carbon dioxide into the atmosphere? car exhausts, burning fossil fuel and deforestation and burning wood 16 of 20 How do humans release Methane into the atmosphere? rice farming, farm livestock, decaying organic matter 17 of 20 How do humans release Nitrous oxide into the atmosphere? power stations, sewage treatment, car exhaust 18 of 20 How can climate change be managed? Alternative energy sources, Carbon capture, Planting trees and International agreements 19 of 20 How does alternative energy sources help manage climate change? using energy resources like hydro-electricity, nuclear power doesn't emit as much carbon dioxide as burning fossil fuels 20 of 20
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