Layer
* All layers are present in all parts of the cortex.
* Most layers absorb energy
  - act like blankets
* Most layers consist of cores
  - materials
* Most layers contain aerosol particles
  - bacteria
  - chloroplasts
  - heavy elements
  - matter
  - organic matter
  - primary protective structures
* Most layers contain small aerosol particles
  - contribute to fire
* Most layers cover skin surfaces
* Most layers form outer surfaces
* Most layers have high strength
  - momentum
  - orientations
  - thickness
* Most layers protect connective tissue
  - plants
  - reduce evaporation
* Most layers retain moisture
  - water
* Most layers surround basement membranes
  - egg membranes
  - vary in thickness
* Some layers absorb harmful rays
* Some layers act as insulation
  - protective barriers
  - thermal insulation
* Some layers are colored to simulate meat, others are colorless to represent fat
  - composite layers that is made up of other layers
  - formed by sediments
* Some layers are made of dense materials
  - separated by layers
  - consist of proteins
* Some layers contain complex polysaccharides
  - pores
  - tiny pores
  - create light
* Some layers have calcium
  - chemical compositions
  - clouds
  - dark pigment melanin
  - footprints of vertebrates on their surfaces
  - low refractive indexes
  - similar chemical compositions
* Some layers prevent dehydration
  - sunlight
* Some layers produce light
  - spores
* Some layers protect animals
  - eyes
  - organs
  - sex organs
  - provide nutrients
  - stretch between bones
  - support cell membranes
* Some layers surround earth
  - lungs
* also keep in body heat.
* are an important tool in grouping objects by category
  - artifacts
  - hens
  - made by deposition of sediment, organic matter, and chemical precipitates
  - part of laminates
  - regions
  - turned into rock by slow geological processes that take a long time
* can appear and disappear in time independently
  - provide information on geologys, soil, land use, species distribution, vegetation, etc
* contain primary protective structures
* create barriers
  - considerable barriers
* develop fastest just after sexual differentiation.
* exist everywhere - even within craters.
* have a tendency to flow slightly
  - bumpy texture
  - components
  - same effects
* help conserve moisture and moderate temperature variations.
* includes sections.
* interact with each other in an effort to achieve mass equilibrium.
* is an artifact
* offer protection.
* present absorption.
  - pansy plants
* provide barriers
  - effective barriers
  - warmth
* separate layers.
* support types.
* touch environments.
+ Rock (geology), Rock classification, Sedimentary rock
  * Sedimentary rocks are the most common rocks on Earth. They form at or near the Earth's surface. Sedimentary rock is formed in layers which were laid down one by one on top of another. Some of the layers are thin, some are thick. Layers are made by deposition of sediment, organic matter, and chemical precipitates. Deposition is followed by squeezing of sediment under its own weight, and cementation.

### layer:

Carpet layer
* position the carpet and stretch it evenly over the floor and to the walls.
* use glue and staples when carpeting certain areas.