pure chemical substance made up of same atoms
variety of organisms in an ecosystem. Indicator of the health of an ecosystem.
nonliving, physical features of the environment, including air, water, sunlight, soil, temperature, and climate
coal, oil, natural gas, and other fuels that are ancient remains of plants and animals. Hydrocarbon
the ability to dissolve in another substance
process by which plants use the sun's energy to convert water and carbon dioxide into sugars
CaCO3 - shells, limestone
biogeochemical cycle that describes transformation of these compounds in nature CaCO3, CO2, HCO3−, CH4, R-CH3
biogeochemical cycle that describes the transformation of these compounds in nature N2, NH4+, NH3, NO2-, NO3, R-NH2
measure of the concentration of H+, power of Hydrogen
notation that shows what elements a compound contains and the ratio of atoms or ions in the compound
A pathway by which a chemical elements moves through both living and non-living components of an ecosystem
O2, diatomic molecule which composes 21% of dry air
CO2, colorless, odorless gas, produced by burning carbon and organic compounds and by respiration and absorbed by plants in photosynthesis.
HCO3-, decreases pH of environment
CH4, odorless flammable gas that is the main constituent of natural gas
CH2O, common names sugar and starches. Form of chemical energy for cells, broken down into glucose
N2, diatomic molecule which composes 78% of dry air
NH3, A colorless gas with a characteristic pungent smell. It dissolves in water to form a strong base solution.
NO3-, compound used by plants for nutrients
R-NH2, large biomolecue made of amino acids and used as structural material for cells
process of burning, producing heat and light
building living tissue
process which bacteria convert atmospheric nitrogen to usable forms for plants