Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
why do organism need nitrogen?
|
major component of proteins, nucleic acids, and ATP
|
|
|
Nitrogen
|
non reactive, must be converted to usable form
|
|
|
N-fixation
|
atmospheric N2 is changed into usable N
|
|
|
Compounds
|
it is "fixed" into usable form
|
|
|
Nitrification
|
ammonia is converted into Nitrates, then Nitrate s
|
|
|
Assimilation
|
fixed N becomes part of plant/org. tissue
|
|
|
fertilizer
|
compounds that put usable forms of N into the soil
|
|
|
legume
|
plants (usually w/ pods) that can fix N
|
|
|
denitrification
|
conversion of Nitrate into N2
|
|
|
sink/reservoir
|
a place where nutrients are absorbed from environment & stored
-biomass is always a reservoir |
|
|
source
|
any activity that releases nutrients back into the environment
|
|
|
releasing agent
|
a chemical used to prevent other materials from bonding to surfaces
|
|
|
nutrient
|
any substance an organism needs to survive
|
|
|
limiting nutrient
|
nutrient that is in short supply
-needed by most org. & in large amounts -used up before other nutrients |
|
|
biochemical cycle
|
matter cycles through life and Earth through biogeochemical Cycles
|
|
|
autotroph
|
make own food
-manufacture from inorganic molecules -draw raw materials from ground or other media (water,ect) |
|
|
heterotroph+reperation-02
|
cannot make own food
|
|
|
leaching
|
drain away from soil
|
|
|
decay
|
rot or decompose
|
|
|
CHNOPS
|
carbon
hydrogen nitrogen oxygen phosphorus sulfur |
|
|
matter
|
constant cycle
|
|
|
energy
|
one way and always lost
|
|
|
role plants have in water
|
absorb
looses from transpiration store H2O use during PS |
|
|
role humans have in water
|
consume-release
irrigation/dams pollute CR |
|
|
water cycle and other cycles
|
dissolve nutrients for easier uptake
assimilation-decomposition |
|
|
water cycle
|
consume-urination/perspiration
condensation-evaporation/precipitation PS-CR ground water-run off |
|
|
carbon cycle
|
combustion of fossil fuels-carbonation
assimilation-decomposition PS-CR |
|
|
why do organism need carbon?
|
foundation of organic molecules: carbs, lipids, proteins, nucleic acids, used for energy/ATP- usable form of cell E
|
|
|
lightning
|
how N is fixed in the atmosphere
|
|
|
how humans add N into atmosphere and eventually get into producers
|
decomp. of waste/dead org. release N, fertilizer, combustion- release N compounds contribute to acid rain
urination-urea |
|
|
why is N so important to living things
|
major component of proteins, nucleic acids, and ATP
|
