C. 13 Earths Atmosphere Flashcards
(31 cards)
What is the approximate propotion of the nitrogen in Earth current atmosphere
80%
What is the approximate proportion of oxygen in Earth’s current atmosphere?
20 %
which gases are in small proportions in the current atmosphere
nobel gases, water vapour, carbon dioxide
when earth was formed which planet was its atmospere similar to
venus and mars
what do mars and venus atmosphere comprise of
CO2 with little O2
what produced the gases present in earth early atmosphere
volcanoes
which gases where present in earth early atmosphere
CO2 , water vapour and nitrogen with small amounts of methane and ammonia
why have therie about earth early atmosphere developed and changed over time
evidence is limited and it was billions of years ago
by what process do algae and plants produce oxygen
photosynthesis
photosynthesis word equation
Carbon dioxide +water = oxygen + glucose
how did the worlds ocean form
the earths temperature cooled, causing water vapour in the air to condense
how did algae and plants reduce levels of CO2 in earth early atmosphere
photosynthesising
how were sedimentray rocks formed
when shells of organisms made using dissolved carbon dioxide, fell to the bottom of the ocean, were covered and compressed
how was coal formed
plants that grew millions of years ago died and became compressed under rocks
how was crude oil and natural gas formed
plankton that lived millions of years ago , died and become trapped and compressed under rocks
what is locked up carbon
when carbon dioxide the atmosphere formed sedimentary rock and fossil fuels
how did the seas and ocean decrease the amount of CO2 in the atmosphere
- CO2 can dissolve in water
- Produce metal carbonate
- Crusations use for their shells
Name 3 green house gases
Water vapour, carbon dioxide and methane
Describe the wavelengths of radiation that comes from the sun and is reflected by the Earth
Sun - short
Earth - long
What happpens to long wave radiation that is reflected from the earth in the atmosphere
absorbed by green house gases
what is the name given to the process that warms the earth
the greenhouse effect
what humans activities increase CO2 levels
deforestation , burning fossil fuels
What human levels increase meathane levels
farming animals and landfill
what is the name given to teh increasing average temp of the earth
global warming
