### meteorite:

Iron meteorite
* are almost all metal, a nickel-iron alloy
  - less subject to break up in flight due to their greater structural stability
  - much more frequently found than stony ones
  - nearly pure metallic nickel-iron
* are the most common group of meteorites by weight
  - samples of the cores of ancient worlds
* are the type most often found, because of their unusual appearance
  - people think of when they hear the word
  - very hard on diamond blades of conventional lapidary saws
* consist mainly of an iron-nickel alloy
  - mostly of iron and nickel
* lacking a well-developed etch pattern are classified as ataxites.

### meteorite:

Pallasite
* Consists of a matrix of nickel-iron with embedded grains of olivine.
* are easily the most beautiful meteorites, especially when cut and polished
  - meteorites made up of both stone and iron
  - some of the most sought after meteorites because of their striking beauty
  - stony iron meteorites composed of olivine enclosed in metal
* contain approximately equal proportions of silicate and nickel-iron.
* form beautiful olivine crystals that are embedded into a metal matrix.
* probably form when the olivine-rich mantle of an asteroid mixes with the metallic core.

Stony meteorite
* Most stony meteorites contain chondrules and therefore are called chondrites.
* are difficult to identify
  - harder to identify because they look like volcanic rocks
  - similar to terrestrial rocks
* are the hardest to identify since they look very much like terrestrial rocks
  - ones most commonly observed falling to Earth
* can superficially resemble earth rocks, so they often go unnoticed.
* contain small flecks of free metal.
* look similar to ordinary rocks.

Meteorological phenomenon
* Meteorological phenomena occur during seasons.
* Most meteorological phenomena occur during seasons.

Methane
* More methane comes from rice paddies and forest fires.
* Most methane comes from gases
  - natural gases
  - sources
* Most methane is produced by decay
  - released to the atmosphere via the leakage of natural gas from distribution systems
* Most methane produces vapor
  - water vapor
* Some methane absorbs light
  - red light
  - goes into lungs
* Some methane has bonds
  - covalent bonds
* Some methane helps energy
  - renewable energy
* Some methane is manufactured by the distillation of coal
  - produced by cattle
* Some methane traps in ocean sediments
* contributes to emissions
  - global emissions
  - greenhouse gas emissions
* fluxes from terrestrial environments.
* is alkane
  - chemical compounds
  - fuel
  - greenhouse gases
  - paraffin
* originates from cattle and landfills.
* transmits light
  - visible light

### methane:

Atmospheric methane
* Some atmospheric methane absorbs light
* breaks down within a decade.
* is the methane present in Earth's atmosphere.

Methionine
* is amino acid
  - chemical compounds
* works very well in supplements that also include omega fatty acids in their formula

Methodology
* Describes the refined scientific means to understand deeper aspects of reality.
* Methodologies account for variation.
* Methodologies are epistemology
  - methods
  - taxonomies, or well-organized collections, of related methods
  - the way programs and systems are developed
* Methodologies depend on factors
  - several factors
  - describe procedures
  - drive approaches
  - eliminate defects
* Methodologies involve sequential steps
* Methodologies provide accurate solutions
  - support management
* Some methodologies focus on light.
* is epistemology
  - how observers go about their observations and explanations of social reality
  - the study of research methods
* refers to a theoretically informed framework.