Listening and Taking Notes - Life and Employability Skill Practical: Experiment 1

Experiment 1

Date:

Listen to the following passage and take down notes:

Global warming is the increase in Earth’s temperature due to the greenhouse gases by burning fossil fuels. Between 1906 and 2005, it increased 0.6 to 0.9 degrees Celsius and it doubled in the last 50 years.

The cause of global warming is the increasing quantity of greenhouse gases such as carbon-di-oxide, methane and nitrous oxide in our atmosphere.   In addition to burning of fossil fuels, deforestation, smoke from vehicles and factories cause global warming. Since the Industrial Revolution began in about 1750, carbon dioxide level has increased nearly 38 % in 2009 and methane level 148 %.

Greenhouse gases are not actually harmful to earth. They trap heat in the Earth's atmosphere to keep the planet warm enough to sustain life; this process is called the greenhouse effect.  Without this, the Earth would be too cold for humans, plants and other creatures to live. However, higher levels of these gases trap more heat and the temperature of earth increases more and more. This is what we say as global warming.

The impact of global warming is far greater than just increasing temperatures. Current research is showing that the water cycle is changing and rainfall patterns are shifting to make the already dry areas even drier. Global warming is thus causing water shortages and an intense amount of distress to the over 2.5 million people in dry regions. These regions are degrading into desert. This process is called desertification. Perennial ice cover in the Arctic is melting at the rate of 11.5% per decade.  The thickness of the Arctic ice has decreased by 48% since the 1960s. Since 2010, the Antarctic ice melt rate has doubled. The Earth's sea level has risen by 21 cm since 1880. Power Dissipation Index (PDI) which measures the destructive power of tropical cyclones has increased in the Pacific by 35% and in the Atlantic it has nearly doubled. Research has found that the Earth’s temperature could rise between 2ºC and 6ºC by the end of the 21^st century.

Answer: 

Notes on Global Warming

Global warming - increase in Earth’s temperature - burning fossil fuels- 1906 and 2005-0.6 to 0.9ºC- doubled in 50 years – cause: increasing greenhouse gases –CO²,CH4 and N2O - burning of fossil fuels- deforestation- smoke from vehicles - Industrial Revolution 1750 - CO² increase 38 % in 2009 - CH4 148 % - Greenhouse gases not harmful to earth- trapping heat to sustain life- the greenhouse effect- too cold for humans, plants and other creatures - higher levels - more heat - global warming -The impact GW: - water cycle changing- rainfall patterns shifting - dry areas even drier -water shortages - distress to 2.5 m people - degrading into desert- desertification-Perennial ice cover - Arctic - 11.5% per decade- thickness of ice decreased by 48% 1960s- Since 2010 Antarctic ice melt doubled- Earth's sea level rise -21 cm since 1880-Power Dissipation Index (PDI) --increase in Pacific  35% - in Atlantic doubled-Research : Earth’s temp. rise between 2ºC and 6ºC - end of  21^st c.

Watch Global Warming Animation Video:

Global Warming - Tamil Song: