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Poop Loop Lab download (Ecology image (nitrogen cycle image (nitrous…
Poop Loop Lab
Chemistry
Poly-atomic ions
Two or more atoms held together with a covalent bond that still contain a charge
Na+ NO3- → NaNO3
Polyatomic ions are composed of two or more atoms bonded together by covalent bonds with an uneven number of electrons and protons, creating a net charge
Ecology
nitrogen cycle
nitrous oxide from fossil fuels falls as acid rain
runoff from nitrates in farming enters water
Bacteria in soil and water fix nitrogen from the air
plants obtain nitrate ions from soil and water bacteria
animals eat plants
decomposer bacteria break down and plant matter into nitrogen compounds
Nitrogen compounds eventually break down compounds into gas and then into the air
nitrogen
nitrogen storage
atmosphere
soil
in living creatures
oceans and marine sediment
from salmon to trees
Salmon Carcass
Scavengers feed on
Scavenger feces deposited in forest
Marine-derived nutrients enter soil
Nutrients taken up
by vegetation through roots
Herbivores feed on vegetation
Scavenger hauls carcass into forest
Biology
all organisms take in matter from their environment to survive
Almost all of the mass of human bodies comes from just six elements
oxygen
nitrogen
hydrogen
phosphorus
carbon
calcium
Plants require 17 elements
Growth
cell division
reproduction
sexual
humans and animals
advantages
disadvantages
requires two mates
waste of energy finding a mate
asexual
plants
starfish
advantages
only requires one mate
disadvantages
No genetic variation makes them vulnerable to sudden climate changes
If a predator or disease adapts to kill one individual they are all susceptible.
potatoes
