Upgrade to remove ads
Science chapter 2.2
Terms in this set (30)
what are nutrients?
chemicals required for growth and other life processes
without interference, the amount of nutrients flowing into a store_______the amount flowing out
what are some examples of human activities that can upset the natural balance of nutrient cycles?
land clearing, agriculture, urban expansion, mining, industry, motorized transport
what are some short-term carbon stores
aquatic and terrestrial organisms, CO2 in the atmosphere, CO@ in top layers of the ocean
what are some long term carbon stores?
middle and lower ocean layers, coal, oil and gas deposits, sedimentary rocks and marine sediments
What is sedimentation?
the process that contributes to the formation of sedimentary rock, trapping many long-term stores of carbon.
How is carbon cycled through ecosystems?
photosynthesis, cellular respiration, decomposition, ocean processes/mixing, eruptions and fires
What human activites have affected the carbon cycle?
burning fossil fuels, greenhouse gasses etc..
in plants nitrogen is important for....
What is the largest store of nitrogen
the atmosphere in the for of N2 gas.
what are the three main steps of the nitrogen cycle?
nitrogen fixation, nitrification, uptake.
what are the three ways in which nitrogen fixation can occur
in the atmosphere, in the soil, in the water.
what is nitrification?
when soil bacteria convert ammonium into nitrate
how is ammonium converted into nitrate
by nitrifying bacteria
what are the two stages in nitrification?
first the ammonium is converted into nitrite, and then the nitrite is converted into nitrate
**note that each stage is completed by a different nitrifying bacteria.
Nitrates enter plant roots via____
how is nitrogen returned into the atmosphere?
How is nitrogen removed from ecosystems?
dissolved in waterways, washes into lakes and oceans, sediments
what human activities release nitrogen into the atmosphere?
burning fossil fuels, burning forests, agricultural practices
what is monoculture?
humans grow single crops of legumes over large areas. These crops fix atmospheric nitrogen, greatly increasing the rate of N-fixation in these areas.
Why is phosphorus important?
it is part of the ATP molecule, it promotes root growth, stem strength and seed production, and it is important for strong bones as well.
Where is phosphorous stored?
not in the atmosphere. it is stored in sediments on the ocean floor.
what is weathering?
weathering releases phosphates from rocks.
What is chemical weathering
via acid precipitation or lichens
what is physical weathering?
where wind, water and freezing release phosphates.
weathering doesn't occur until there is ______
what is geologic uplift?
it is when rock is exposed in order to undergo chemical or physical weathering.
How do humans add phosphorous to the environment?
mining for fertilizer
How do humans take away phosphorous to the environment?
slash and burning of forests
changes in nutrient cycles can also affect____
THIS SET IS OFTEN IN FOLDERS WITH...
Science Chapter 10.2
Science Chapter 3
YOU MIGHT ALSO LIKE...
CARBON AND NITROGEN CYCLE
Ecology Unit 10
Nutrient Cycles in Ecosystem
Earth Science 10
OTHER SETS BY THIS CREATOR
Science chapter 12.2
OTHER QUIZLET SETS
research methods chapter two
Review for state test 2019