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28 Cards in this Set

  • Front
  • Back
Greenhouse Effect: Role of green plants and photosynthesis
Absorb CO2 during photosyntesis
Greenhouse Effect: Ice Core Dating
Use data from ice cores to reconstruct greenhouse gas concentration and temperature information going back as far as 160,000 years ago
Greenhouse Effect: Oxygen/Ozone Screen
<_320 nm = ozone
<-242 nm = oxygen
Higher wavelength lower energy
Greenhouse Effect: Role of visible, IR radiation
Molecules absorb then then they vibrate and return heat energy to earth
Two forms of the same element whose atom numbers differ in number of nuetrons and hence in mass (Carbon 14 had 6 protons (atomic number) and 8 neutrons which add up to 14)
Carbon Dioxide
Bending is less energy and strechting is more energy
Transmission vs absorption
High transmittence = low absorbance
C-14 Dating
determine the age of carbonaceous materials
UV Dissociates
Higher energy photons with high frequencies and short wavelengths can break up molecules. The less energetic photons of infrared light cause many molecules to vibrate
Bio Chemistry
The study of living things
Organic Chemistry
The study of carbon containing compunds
Inorganic Chemistry
The study of minerals
Analytical Chemistry
the analysis of material samples to gain an understanding of their chemical composition and structure
Physical Chemistry
provide molecular-level interpretations of observed macroscopic phenomena.
Carbon Cycle
The cycle is usually thought of as four main reservoirs of carbon interconnected by pathways of exchange. The reservoirs are the atmosphere, terrestrial biosphere (usually includes freshwater systems), oceans, and sediments (includes fossil fuels). (gas liquid, solid, animal, mineral)
CO2 Sources
Fossil Fuel combustion, cement production, tropical deforestation
CO2 Sinks (Stores)
Atmosphere, Uptake by ocean, Northern Hemisphere, forest regrowth, CO2 fertilization, nitrogen fertilization, climatic effects?
Percent Composition
What Percent of CO2 is C C=12g 2 X O=16 X 2= 32g
CO2=44g 12 is 27%
Number of atoms and molescules taking place in an reaction is proportional to the number of moles of the same substance
Greenhouse effefct on oceans
Oceans warmer
Greenhouse effect on arable land
Drier, less arable
Greenhouse effect on tree line
Greenhouse effect on tropical disease
Less plant groth, less CO2 absortion
Differences Between Greenhouse effect and global warming
Global warming is the result if concentrations of greenhouse gases increase, returning more than the usual portion of the heat (infrared radiation) radiated by the earth so global warming is more intense effect cause by greenhouse gases
Alternatives to CFC's
HCFC's and HFC's
Kyoto Protocol
Not signed by the US, established goals to stabilize and reduce atmospheric greenhouse gas concentration levels that are more environmentally responsible
Global Warming
Mostly the troposphere, involves CO2, CH4, and N20, Molescules absorb IR which vibrate and reemmit to earth, increasing global temp., release CO2 from fossil fuels is the source of problem, contorlled by Kyoto Protocol
Ozone Depletion
Stratosphere, substances O3, O2, CFCs, UV absorbed and dissociated into smaller fragments, increasing exposure to UV radiation, source is CFC's release Cl which destorys O3, can cause skin cancer, controlled by Montreal Protocol