Climate Change
Visão Geral
The same blanket of gases that keeps our planet warm enough for life is now growing thicker, and the Earth is responding. Burning fossil fuels, clearing forests and farming on a vast scale are adding carbon dioxide and methane to the air faster than nature can remove them. The result is the enhanced greenhouse effect: more heat is trapped, the planet warms, and the climate that farmers, cities and ecosystems all depend on begins to shift. This is one of the defining environmental challenges of our time.
In this lesson you will learn what counts as a greenhouse gas and the human activities that are raising their levels, then trace how the enhanced greenhouse effect leads to global warming and climate change. You will study the wide-ranging impacts, from rising seas and ocean acidification to changing crop yields and forced migration, and you will weigh up the strategies, both reducing emissions and adapting to change, that the world is using to respond.
Objetivos
- 4.2.1 Define a greenhouse gas as a gas that absorbs radiation and emits the energy as thermal (heat) energy.
- 4.2.3 Describe the causes of increased concentrations of greenhouse gases in the atmosphere, limited to: (a) combustion of fossil fuels: releases carbon dioxide (b) agriculture: digestion by cattle, manure decomposition and rice fields release methane (c) deforestation: reduces removal of carbon dioxide by photosynthesis (d) changes in land use: wetland drainage releases methane (e) cement manufacture: calcium carbonate (limestone) is heated to produce calcium oxide (lime) and releases carbon dioxide (f) increasing human population and increased energy usage: releases carbon dioxide.
- 4.2.4 Describe and explain the effects from increased concentrations of greenhouse gases in the atmosphere leading to the enhanced greenhouse effect, limited to: (a) greenhouse gases absorb solar radiation causing global warming (b) global warming can result in climate change.
- 4.2.5 Describe and explain the impacts of climate change, limited to: (a) increase in temperature of Earth’s surface (b) increase in temperature of ocean surface (knowledge of ENSO, El Niño and La Niña is not required) (c) melting of ice sheets, glaciers and permafrost leading to a rise in sea level (d) ocean acidification due to increased concentrations of carbon dioxide in the atmosphere (e) disruption to food chains (f) change in biodiversity (g) loss of habitat (h) forced migration of humans and other animals (i) increased frequency and severity of extreme weather events leading to flooding and loss of land, drought and wildfires (j) change in crop yields (k) increased pest outbreaks and invasive species (l) food shortages.
- 4.2.6 Describe strategies for reducing carbon footprints to limit the impacts of climate change, limited to: (a) reduced use of fossil fuels (b) make more sustainable food choices: plant-based diet, seasonal food, buy locally produced foods (c) reduction in livestock farming (d) reduction in number of children per woman (e) increase in energy efficiency (f) reforestation and afforestation (g) carbon sequestration: capture, remove and store carbon dioxide (h) transport policies (i) international agreements and policies (j) taxation (k) research and climate models (l) use of artificial intelligence (AI) to predict the impacts of climate change and develop strategies to reduce the impacts of climate change.
- 4.2.7 Define climate change adaptation as altering behaviour, practices and infrastructure to adapt to the impacts of climate change.
- 4.2.8 Describe climate change adaptation strategies, limited to: (a) crops that resist warmer, drier or wetter conditions (b) improve flood defences (c) legislation about building near coasts and on floodplains (d) building design and materials.
- 4.2.9 Discuss the benefits and limitations of strategies to manage the impacts of climate change.
Nota de Aula
Disponível na aplicação Green Bridge
Transfira a aplicação Green Bridge CBT para o seu telemóvel ou computador para aceder a notas de aula completas, questões de prática e muito mais.
Avaliação da Lição
Parabéns por concluir a lição em Climate Change. Agora que você explorou o conceitos e ideias-chave, é hora de colocar seu conhecimento à prova. Esta seção oferece uma variedade de práticas perguntas destinadas a reforçar sua compreensão e ajudá-lo a avaliar sua compreensão do material.
Irá encontrar uma mistura de tipos de perguntas, incluindo perguntas de escolha múltipla, perguntas de resposta curta e perguntas de redação. Cada pergunta é cuidadosamente elaborada para avaliar diferentes aspetos do seu conhecimento e competências de pensamento crítico.
Use esta secção de avaliação como uma oportunidade para reforçar a tua compreensão do tema e identificar quaisquer áreas onde possas precisar de estudo adicional. Não te deixes desencorajar pelos desafios que encontrares; em vez disso, vê-os como oportunidades de crescimento e melhoria.
- A greenhouse gas is best defined as a gas that: A. Destroys ozone in the stratosphere B. Absorbs radiation and emits the energy as heat C. Reflects sunlight back into space D. Reacts with water to form acid rain Answer: B
- Which human activity is the main source of methane? A. Cement manufacture B. Cattle farming and rice fields C. Burning coal in power stations D. Driving petrol cars Answer: B
- Which of the following is an impact of climate change? A. A larger ozone hole B. Lower levels of ultraviolet radiation C. Rising sea levels from melting ice D. More argon in the air Answer: C
- Which strategy is an example of adaptation rather than mitigation? A. Installing solar panels B. Planting forests C. Building higher flood defences D. Capturing carbon dioxide Answer: C
- Carbon sequestration helps limit climate change by: A. Reflecting sunlight away from the Earth B. Capturing and storing carbon dioxide C. Removing CFCs from refrigerators D. Reducing ultraviolet radiation Answer: B
Disponível na aplicação Green Bridge
Transfira a aplicação Green Bridge CBT para o seu telemóvel ou computador para aceder a notas de aula completas, questões de prática e muito mais.
Disponível na aplicação Green Bridge
Transfira a aplicação Green Bridge CBT para o seu telemóvel ou computador para aceder a notas de aula completas, questões de prática e muito mais.
Livros Recomendados
Pratique Questões Simuladas
Quer praticar questões simuladas sobre Climate Change? Descarregue a aplicação Green Bridge CBT para aceder a questões simuladas e avaliações completas sobre este tópico.
Descarregar a aplicação na Google Play Store
Tudo o que precisas para te destacares no JAMB, WAEC e NECO.
