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for the first billion years on earth what was there lots of?
volcanic activity which produced lots of C02
how were the oceans formed
from water vapour condensing
after 2 billion years what then evolved
plants and algae
what did the plants and algae do
photosynthesised which cause C02 levels to drop and 02 levels to increase
what is the atmosphere mainly made of
oxygen and nitrogen
when plants and algae died what formed
sedimentary rock and fossil fuels
what is the word equation for photosynthesis
carbon dioxide + water → oxygen + glucose
list three of the main greenhouse gases
carbon dioxide
methane
water
what is carbon footprint
refers to the total amount of CO2 and greenhouse gases emitted by somethings activities over their lifetime
give three factors needed when calculating somethings carbon footprint
how materials were sourced
manufacturing process
how it was disposed of
what is carbon capture technology
it allows us to capture carbon dioxide and store it underground so it isn’t exposed to the atmosphere
what is the formula for complete combustion
hydrocarbon + plenty oxygen → water + carbon dioxide
what is produced during incomplete combustion
carbon monoxide and soot
what causes global dimming
soot in the atmosphere which reflects sunlight back into space
why is breathing in carbon monoxide dangerous
the particles bind to our blood ( haemoglobin) with less oxygen meaning not enough oxygen is being transported around the body and to the brain , which could cause death
why is carbon monoxide hard to detect
colourless
odurless
which two gases form acid rain
sulphur dioxide and nitrogen oxides
how is acid rain formed
when sulphur dioxide or nitrogen oxides mix with clouds, they dissolve which forms dilute acids leading to acid rain
