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Earth's life support systems (Uses of water for plants and animals…
Earth's life support systems
The importance of water in supporting life on the planet
Ubiquity of water = water everywhere because of the distance from the sun. Earth = Goldilock's zone :honey_pot:
Liquid water :droplet: is necessary for life
Oceans
cover :whale:
71%
-> moderate temperatures by absorbing heat, storing it and releasing it
slowly
.
Clouds
:cloud: reflect
1/5
of
solar
radiation & lower surface temperatures.
Water vapor
(greenhouse gas) absorbs
long-wave
radiation to maintain global temps. Would be 15°C
higher
Uses of water for plants and animals
Water =
65-95%
of all living organisms
Plants use water for
photosynthesis, respiration and transpiration
Photosynthesis
= carbon dioxide + sunlight +
water
=glucose
Respiration
= glucose -> energy ll through a reaction with oxygen ->
water
+ carbon dioxide
Water is used for
rigidity
of plants and to transport
nutrients
.
Animals :bear:
-> water = all chemical reactions & circulation of oxygen and nutrients
Transpiration
to cool plants by evaporation
Sweat to cool down humans
Mammals, reptiles and birds cooling :bird: =
panting
Importance of Carbon on Earth
Stored in rocks ->
limestone
, seafloor sediments, ocean water (dissolved carbon dioxide),
atmosphere
(carbon dioxide, gas) and the
bioshpere
Life is carbon based: built on
large molecules
Proteins :meat_on_bone:
Carbohydrates :bread:
Nucleic acids
Economic resource
:moneybag:
Fossil fuels, oils, coal and natural gas :fire:
Oils
= plastics, paints :lower_left_paintbrush: & synthetic fabrics
Agriculture
:tractor:= lots of Carbon -> humans -> food :green_salad:, timber :evergreen_tree:, paper :rolled_up_newspaper:, textiles :jeans:
Water = Economic
:moneybag:
Irrigate crops :potato:
Drinking :wine_glass:
Electricity :bulb:
Sewage :poop:
Recreational facilities :woman-swimming:
Food
manufacturing :shallow_pan_of_food:
Brewing :beer:
Paper making :newspaper:
Steel making :fork_and_knife: