### geologic time:

Ice age
* Most ice ages lead to extinction.
* are part of prehistories
  - periods
  - when the world becomes much colder for a long time
* arrive slowly, too, but they change everything.
* come and go on a regularly basis.
* is characterized by many glacial expansions separated by warmer interglacial intervals
* period in the earth's history when ice sheets cover vast regions of land.
* sediments record orbital climatic influences.
* seem to occur during periods when summers in the Northern Hemisphere are cooler.
+ Climate change
  * It describes changes in the state of the atmosphere over time scales ranging from decades to millions of years. Ice ages are prominent examples.
+ Pleistocene: Cainozoic :: Ancient history

Geological formation
* are pre-Cambrian.
* is an object
* range from sandstone-shale complex to serpentinite.

### geometry:

Analytic geometry
* combines algebra with geomety by introducing coordinates
  - the generality of algebra with the precision of geometry
* is geometry
  - the study of geometry using algebraic methods

Hyperbolic geometry
* goes against common sense about what straight and parallel lines are
  - counter to common sense and our experience of the world
* is the geometry of a disc whose boundary circle
  - star

### geriatricians:

Geriatric psychiatrist
* are geriatricians
  - psychiatrists
* concentrate on helping the elderly.
* specialize in recognizing and treating depression in older adults.

### germanic language:

Cockney
* is Germanic language
* rhyming slang is one such adult language game which has existed over a century.

### giant nuclear furnace:

Single star
* Every single star giant nuclear furnace.
* are much too far away to look like anything more than a point of light in a telescope.

### gimmicks:

Gimmick
* are gimmicks.
* come in many forms.
* is video games.

### girl:

Belle
* are girls.
* includes arms
  - cell membranes
  - cells
  - cytoplasm
  - heads
  - legs
  - necks
  - nuclei
  - personality
  - plasma membranes
  - sections
  - vacuoles
  - woman's bodies

Demoiselle
* bony fish
* establish territory.
* have ability.
* includes arms
  - cells
  - cytoplasm
  - plasma membranes
* maintain separate social groups within the larger flock.

### girl | maiden:

Damsel
* Most damsels are aggressive.
* Some damsels live in a comensal relationship with anemones as do the clownfish.
* are maids
  - very colorful and are very hardy in captivity

### girl:

Young girl
* Many young girls start using tampons early on because they are swimmers or athletes
  - suffer severe medical and emotional problems after an abortion
* Some young girls participate in gymnastics.
* appear to be most at risk because they tend to gain body fat as they begin puberty.
* are at highest risk of unwanted pregnancy and unsafe abortion
  - particular risk of reproductive ill-health
  - more likely to have problems during pregnancy
  - singles
* become less likely to engage in physical activity.
* can become prostitutes, while others are forced to beg.
* desire parties.
* have more problems during pregnancy.
* keep their hair cut very short until they are about seven years old.
* learn lessons
  - valuable lessons
* like to experiment with their hair.
* marry while they are in their teens.
* report less difficulty in getting drugs than young boys.
* see cool guys
* seem to start smoking cigarettes for a variety of reasons, including weight management.
* sleep randomly with older men for survival as poverty is rife.
* tend to be less confident about their success in science and math than young boys.
* wear their hair in braids, which is coiled up onto their heads after marriage.