### natural things:

Shield volcano
* Most shield volcanoes have a roughly circular or oval shape in map view
  - many craters on their summits
  - similarity
  - occur in the ocean
* Some shield volcanoes get to be very large.
* are almost exclusively basalt, a type of lava that is very fluid when erupted
  - broad domes, generally form from low viscosity basaltic lava flows
  - common in the Hawaiian islands
  - composed mostly of basalt
  - formed by lava that flows easily
  - known to form on other planets
  - more flat than all of the other volcanoes
  - non-explosive volcanoes with gentle slopes in the form of a cone
  - perhaps the most awesome Martian feature
  - the largest volcanic features on earth
* are the largest volcanoes on Earth
  - the face of the Earth
  - type found in Hawaii
  - widest of the three landforms in the activity
  - volcanos
* can evolve to be the largest of the Earth's landforms
  - produce huge areas of basalt, which is usually what lava is when cooled
* erupt in different way.
* form from eruptions of flowing lava
  - lava and are dome shaped
  - when hot, fluid lava erupts non- explosively
* grow on the ocean floor above hot spots but also form above subduction zones.
* have calderas and typically long lava flow channels
  - gradual slopes and are produced by lava flows building up upon each other
  - low slopes and consist almost entirely of frozen lavas
  - summit calderas formed by piston-like subsidence
* produce an awful lot of lava.
* tend to be very big
  - erupt non-explosively, mainly pouring out huge volumes of fluid lava
+ Volcano, Types of volcanoes, Shield volcanoes
  * Because the lava is so fluid, it spreads out, often over a wide area. Shield volcanoes do not grow to a great height, and the layers of lava spread out to give the volcano gently sloping sides. Shield volcanoes can produce huge areas of basalt, which is usually what lava is when cooled.
  * Shield volcanoes are formed by lava that flows easily. Consequently, a volcanic mountain having a broad profile is built up over time by flow after flow of relatively fluid basaltic lava issuing from vents or fissures on the surface of the volcano. Many of the largest volcanoes on Earth are shield volcanoes.
  * Shield volcanoes are known to form on other planets. The largest known mountain in the solar system, Olympus Mons on Mars, is a shield volcano. Shield volcanoes on Mars are higher and much more massive than those on Earth.

### naturally occurring virus:

Avian influenza
* comes in two forms, low path and high path.
* naturally occurring virus.
* virus that can infect domestic poultry and other birds.

### natures oldest law:

Self defense
* causes a desire to kill.
* has the additional benefit of being the only thing that can actually stop a crime.
* is nature's oldest law
  - protection

### natures sunscreen:

Autumn color
* are especially vibrant on the lakeshore and hills that surround the lake
  - rich in the tundra vegetation
* can begin to show in late summer in response to prolonged dry spells.
* is nature's sunscreen.
* vary from yellow to orange-brown, and occasionally a deep wine color.

### near brains:

Pituitary gland
* Most pituitary glands stimulate antler growth
  - ovulation secretion
* Some pituitary glands are near brains.
* Some pituitary glands consist of lobes
  - posterior lobes
  - have lobes
  - promote growth
* release hormones.
* secrete growth hormones

### near surfaces:

Large vessel
* Most large vessels carry blood
  - pump blood
* Some large vessels are near surfaces.