OXYGEN CYCLE
What produces oxygen?
oxygen is produced by photosynthesis
in what substances do you find nitrogen?
proteins
carbon in found in the environment as......
carbon dioxide (CO2)
carbon is found in.....
fossil fuels
Photosynthesis symbolic equation
SYMBOLIC EQUATION: CO2+H2O----------O2+C6H206
SUNLIGHT
CHLOROPHYLL
what is nitrogen fixation?
a process that changes atmospheric nitrogen into nitrogen that is usable by living things
we need carbon for......
proteins, fats, and carbohydrates
how carbon is used.....(4 ways)
1. Photosynthesis
2. combustion
3. fossil fuel
4.decomposition
what's using Oxygen?
cellular respiration
how can plants and animals get nitrogen? (2 ways)
1. plants and organisms get nitrogen from soil and water
2. animals get nitrogen by eating plants and other organisms
carbon enters the environment when....
organisms die
if arrow is pointing toward carbon compound it is........
producing carbon dioxide (CO2)
Cellular respiration symbolic equation
C6H1206+6O2=6CO2+6H2O+ATP
how does nitrogen return to the environment? (2 ways?)
1. when organisms die
2. manure
humans get carbon from.....
food
if arrow is leaving carbon compound it is..........
using carbon dioxide (CO2)
plants get carbon from......
the atmosphere or water