### alteration | acceleration:

Negative acceleration
* corresponds to decreasing velocity.
* is acceleration in the direction opposite the positive vectors.

Tangential acceleration
* causes a change in rotational speed.
* is the same as radial acceleration in an angular system.

Break
* are accidents
  - dashs
  - delays
  - escapes
  - part of pools
  - scores
  - separation
  - strokes
* branches off trees.
* cause breaks.
* increase when the animal is given drugs and exposed to radiation.
* is an occurrence
* occur along the chromosomes, and they rejoin, trading some of their genes.
* provide opportunity.
* require surgery.
* twigs off trees.

### alteration | break:

Comminuted fracture
* are difficult to reduce and fix because they have no inherent stability.
* present a management problem when bone is missing.

Compound fracture
* Most compound fractures are in auto accidents.
* are fractures
  - more obvious because the bone often splinters and breaks the skin
* involve penetration to the skin, which increases infection risk.
* is where the broken bone sticks out through the skin.

### alteration | break:

Normal fault
* are also on angled fault planes, but one side moves down and away from the other
  - common at divergent boundaries
* are common in regions of crustal extension
  - extension, such as rifts and spreading ridges
  - extensions of the earth's crust, and reverse faults are contrac- tions
* are the products of tensional stress
  - reult of tensional stress
  - when the hanging wall has moved down relative to the footwall
* form when tectonic forces stretch the Earth's crust, pulling it apart
  - the crust is being pulled apart instead of being compressed as it is now
* occur mainly in areas where the crust is being extended such as a divergent boundary
  - when there is relative movement down the dip of the fault due to tension
* tend to produce repeated sequences of sedimentary rocks.
+ Earthquake, Causes of earthquakes, Earthquake fault types: Plate tectonics
  * Normal faults occur mainly in areas where the crust is being extended. Reverse faults occur in areas where the crust is being shortened. Strike-slip faults are steep structures where the two sides of the fault slip horizontally past each other.

### alteration | break:

Occultation
* Some occultations are eclipses
  - An 'occultation' is an event that occurs when one object is hidden by another object that passes between it and the observer. A planet, for example, can pass in front of a star. Some occultations are eclipses. The word is often used in astronomy
* allow asteroid shapes and sizes to be determined.
* are events when the moon or a planet covers another object.
* can provide information about the existence and measurements of the obscuring object.
* comes from the word occult, which means to hide.
* involve other bodies as well.
* is the moving of one body in front of another.
* occur when a planet, asteroid, or moon moves between the Earth and a distant star
  - satellite moves behind Jupiter as seen from the Earth
* occur when one celestial body passes in front of another
  - object passes in front of another celestial object
  - object blocks our view of another object
* occurs when a planet moves in front of a star.

### alteration | break | occultation:

Lunar occultation
* are remarkable manifestations of celestial motion.
* happen when the moon passes in front of a star, major planet or minor planet.

Open fracture
* are emergency orthopedic injuries.
* are more dangerous because of the severe bleeding and chance of infection
  - likely to have infection
  - serious due to blood loss and possible infection
* cause infection, which can kill if untreated.

Page break
* 'natural' page break based on the maximum number of lines per page.
* improve the readability of a web page when it is printed.