Natural Cycles Flashcards
(26 cards)
About 95% of living bodies are made from
4 elements
The 4 elements are
Hydrogen
Oxygen
Carbon
Nitrogen
The 4 elements constantly cycle through the
Biosphere
Carbon and nitrogen cycles are driven by
Biological action
About _ percent of a living organism is made from
Carbon
Carbon only makes up _ percent of natural non-living material
0.2
Life takes carbon from environment primarily by _ and concentrates it in bodies
Photosynthesis
Carbon is released from living bodies during
Respiration
Carbon is released from living bodies when they
Die
After released by bodies, carbon returns to natural
Carbon sinks
Carbon sinks include (a,r)
Atmosphere
Rock
Carbon sinks include deposits of (2)
Oil
Gas
CO2 makes up only _ percent of atmosphere
0.04
Dead matter buried in low oxygen environments does not
Fully composed
Due to not fully composing, carbon
Stays in ground
Over millions of years, once living material becomes (2)
Solid coal
Liquid petroleum
Over millions of years, once living material becomes natural gas such as
Methane
When organic matter, including fossil fuel, is burned, it releases (3)
Heat
Ash
CO2 gas
_ released into atmosphere when we use fossil fuels
Carbon
Almost all living things produce CO2 as a waste product of
Respiration
Respiration is the biochemical process that releases energy from
Food
Carbon in remains of dead organisms is released by
Bacteria
Carbon also released by other _ that consumer dead organisms
Decomposers
Plants use energy from sunlight to lock CO2 into
Bigger, more complex molecules
