Name the process that maintains earth at a stable & warm temperature
The Greenhouse Effect
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15
On which continent did scientists conduct an experiment to prove their climate change hypothesis?
Antarctica
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25
Why did scientists choose glaciers to prove their hypothesis about climate change & the concentration of CO2?
Ice builds up over thousands of years โ ice from deeper down is older than ice near the surface, therefore they could observe CO2 ratios from years ago
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20
Mention the name of 2 electromagnetic waves the sun emits to earth
Either: Visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays
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20
What are GHG?
Gases that have the property of absorbing infrared radiation (net heat energy) emitted from Earth's surface and reradiating it back to Earth's surface
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20
What did scientists discover after their glacier investigation?
Periods of higher CO2 concentrations coincide with periods when the Earth was warmer.
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20
Name the 2 main GHG.
CO2 & Water Vapour
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25
What process removes CO2 from the atmosphere? What is the recent problem humans are having with such process?
Photosynthesis. Deforestation is resulting in the reduction of CO2 removal, which causes a bigger concentration of such.
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25
How did scientists prove their hypothesis regarding climate change?
They did an expedition to Antarctica. Here, they extracted and analyzed trapped air bubbles from glaciers to observe C02 ratios.