C1 Flashcards
What percentage of the earth’s atmosphere is 20%?
Oxygen
What percentage of the earth’s atmosphere is 79%?
Nitrogeon
Why was the earth’s atmosphere full of nitrogen,carbon dioxide and water vapour 4 billion years ago?
Due to volcanic eruptions
Why does carbon dioxide in the earth’s atmosphere decrease 4 billion years ago?
Earth is cooling
Why does oxygen start to increase 4 billion years ago?
Photosynthesisng organisms evolved
What are greenhouse gases?
Gases that increase the temperature of the atmosphere
What is the greenhouse effect?
When excess greenhouse gases absorb and radiate radiation from the sun back to earth warming it
What is the carbon footprint?
Total amount of CO2 emitted over the life of a product or event
What is man-made climate change?
That humans activities are causing a increase in global temperature
What is global dimming?
That particulates block light from the sun
What is the source of C02 and what effect does it have?
The source is all combustion and the effect is global warming
What is the source of carbon monoxide and what effect it has?
The source is incomplete combustion and the effect is its toxic
What is the source of oxides of nitrogen and what is the effect?
The source is vehicle engines and the effect is acid rain
What is the source of soot and the effect?
The source is incomplete combustion and the effect is global dimming
What is the source of sulfur dioxide and the effect is has?
The source is burning sulphur and the effect is acid rain
