### sleepiness:

Daytime sleepiness
* can be the symptom of a serious medical disorder called narcolepsy.
* is associated with both inability to fall asleep and stay asleep at night
  - due to disturbed sleep
  - only one consequence of sleep apnea
* is the most common sleep-related disorder of adolescence
  - primary symptom for sleep apnea
* normal but temporary side effect.
* predicts mortality and cardiovascular disease in older adults.

Excessive sleepiness
* has a negative effect on students.
* is usually the first symptom of narcolepsy.

Sleeplessness
* impairs the ability to make good judgments on the job.
* is also common during pregnancy, especially in the later weeks
  - both a symptom and an immediate cause of cerebral disorder
* problem that everyone has experienced.
* sometimes signals a serious illness.

Sleeve
* Some sleeve is part of garments.
* covers tattoos.
* includes cuffs
  - sections
* is cases.
  - shirts
* protects wrists.

### sleeve:

Long sleeve
* are essential for climbing without sunburn
  - more likely to ignite if they touch a heat source
* can actually reject more solar heat than they keep in body heat.
* is sleeve.

Slide
* are descents
  - foil
* are located in laboratories
  - parks
  - made in grass, dirt, sand, or snow
  - motion
  - part of playgrounds
  - photos
  - plate glass
  - the most frequent cause of injury for children under the age of six
* are the narrow trails muskrats make where they enter and leave the water
  - nutria make where they enter and leave the water
  - paths beavers make where they enter and leave the water
  - tunnels to the center of the earth
* includes sections.
* is an artifact
* move as large bodies by slipping along one or more failure surfaces.
* program that can display a bunch of images of various formats in a slide show fashion.
+ Evacuation slide: Aviation safety
  * Some slides are designed to act also as life rafts if the plane lands in the water.
+ Microsoft PowerPoint, Operation: Microsoft Office :: Presentation software
  * Slides can also form the basis of webcasts.
+ Playground slide: Playground equipment
  * Slides are made of metal or wood. They must have a smooth surface so that the child does not hurt himself.

### slide:

Rock slide
* Most rock slides occur because the hillslope and rock layers dip in the same direction.
* are a hazard to walruses on terrestrial haulouts and occasionally result in mortality.

### sliding scale:

Human value
* are the contemporary currency of commerce
  - hallmark of human evolution and the basis of a peaceful and prosperous world
  - universal
  - what people measure, rather than the value of things
* derive directly from reality and human nature.
* have a fourth values, the emotive.
* is always higher than any market value.
* provide moral centers for historical narratives.
* sliding scale.

Slime
* All slimes can potentially harm surfaces, especially wood.
* Most slime contains chemicals
  - covers skin
  - has odor
  - slimes are tangles of long, chainlike polymer molecules
* Some slime absorbs moisture
  - affects skin
  - contains nitrogen
  - deters predators
  - is secreted by hagfishes
  - prevents dehydration
  - protects hagfishes
* can form that clog heat exchangers.
* gooey substance that kids love to play with.
* has components
* helps to trap sediment and nutrients.
* is made by reacting just two compounds or ingredients
  - mostly proteins
  - produced by bacteria that infect wounds and diseased tissues in humans
* is the agony of water
  - exudate generated from wetwood and is toxic to growing areas of the tree
  - thus fundamental to the success of many bacteria, for many different reasons
* is useful in mating too
  - to bacteria for several reasons
* mould cells proliferate as unicellular amoebae, which feed on bacteria in the soil.
* serves purposes.