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chunk Memory
Improvement

Memory is defined as the accuracy and ease with which a person can retain and
recall past experiences (Webster's Dictionary, pg. 611). It is often thought of
as a capacity, such as a cup, that could be full or empty. A more common
comparison is one to a computer. Some minds, like computers, can have more
software, being able to save and recall more experiences, information, and
memories than others can. And like a computer, minds can be upgraded. This is
not done with a simple installation of a chip, but by following a number of
small procedures that will enhance and sharpen a memory. As people age, many
people believe that the loss of memory is inevitable. Once people go over a
certain age, they begin to lose their memory and will be thought of as old and
forgetful. People who forget things often complain about a bad memory, but in
most of these cases these people never took the time to learn whatever they
thought they could remember. Most scientists believe there is no such thing as a
good or bad memory, only good and bad learners. Depending on the amount of
attention a person gives something depends on how well a person will remember
that fact or event (Reich, pg. 396). Beginning at the age of 50, people of
similar ages begin to differ more and more from one another in their mental
performance. Some memories drop noticeably, but many stay the same or even rise.
Most investigators agree that no mental decline occurs before the age of 65 or
70 that affects a person's ability to function in the real world (Schrof, pg.
89). In many societies still today, such as in China, elders are considered the
wisest and are very well respected. There are two types of memories, long and
short term. Anything remembered under 30 seconds is considered short-term
memory, and anything after that is considered long-term memory (Kasschau, pp.
57-58). Endell Tulving has broken it down even further into episodic and
semantic memories. Episodic memory is remembering specific events or names.
Semantic memory refers to general knowledge, like speaking a language or doing
math problems (Corsini, pg. 355). Many things can be done to increase and keep a
person's memory sharp. Seeking variety provides a broad range of experiences
that provide reservoirs of knowledge to search through in old age. A willingness
to try new things and improvise gives that mind more experience. People who are
at peace and find life fulfilling have a memory that is stronger and lasts
longer than those who are often angry or depressed do. Strengthening a memory
can start during childhood. Eating right as a baby leads to strong, healthy
brains, while nutritional deficits can permanently impair mental functions.
Getting lots of stimulation and staying in school are two ways to make your
memory last longer. Enriched environments cause brain cells to grow as much as
25 percent more than those in bland environments (Schrof, pg. 91). When a person
reaches young adulthood, making many friends can keep a person sharp. People
with many friends often score higher of cognitive tests and are able to adapt
better to new situations. Finding a mentor and marrying someone who is smarter
than you help also, leading you to strive to match your mate's abilities (Schrof,
pg. 91). As a person enters middle age, putting away money for trips can be
beneficial. People with extra money can treat themselves to mind nourishing
experiences like travel and cultural events. Achieve major life goals now to
avoid burnout. People who head into retirement fulfilled will feel at peace with
their accomplishments (Schrof, pg. 91). When a person enters the late sixties,
they should search for things that continue to challenge them and intrigue the
mind. In other words, do not get bored. Doing things that make you feel like you
are doing something constructive also helps. Those who do not feel like they
have no purpose and tend to burn out. Taking a daily half-hour walk can increase
your scores on intelligence tests. Too much exercise at too much of an intense
pace hinders the memory (Schrof, pg. 91). Neurologists today are finding that
later in life the brain stops producing a hormone involved in the memory
process, acetylcholine. So far results have shown that drugs can act as the
hormone to recharge the memory. Another method of remembering more is called
chunking. Short-term memory is limited in its duration as well as in its
capacity. Your short-term memory can ... more

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VOLCANO

A volcano is a mountain or hill formed by the accumulation of materials erupted through one or more openings in the earth's surface. Most volcanoes have steep sides but sometimes they can slope down or even be flat. The volcanoes above sea level are the best known, but the most volcanoes lie beneath the sea, formed along the global oceanic ridge. Volcanic eruptions in populated regions are a significant threat to people, property, and agriculture. The danger is mostly from fast-moving, hot flows of explosively erupted materials, falling ash, and highly destructive lava flows and volcanic debris. In addition, explosive eruptions, even from volcanoes in unpopulated regions, can eject ash high into the atmosphere, creating drifting volcanic ash clouds that pose a serious hazard to airplanes.
            Lava is magma that breaks the surface and erupts from a volcano. If the magma is very fluid, it flows rapidly down the volcano's slopes. Lava that is more sticky and less fluid moves slower. Lava flows that have a continuous, smooth, ropy, or billowy surface are called pahoehoe flows. But aa flows have a jagged surface composed of loose, irregularly shaped lava chunks. Once cooled, pahoehoe forms smooth rocks, while aa forms jagged rocks. The words pahoehoe and aa are Hawaiian terms that describe the texture of the lava
All volcanoes are formed by the accumulation of. Magma can erupt through one or more volcanic vents, which can be a single opening, a cluster of openings, or a long crack, called a fissure vent. It forms deep within the earth, generally within the upper part of the mantle one of the layers of the earth's crust. Or less commonly within the base of the earths crust. High temperatures and pressures are needed to form magma. Volcanic activity ranges from emission of gases, non-explosive lava emissions to extremely violent explosive bursts that may last many hours. The types of eruptions determine the relative volumes and types of volcaniclastic material and lava flows, consequently the shapes and sizes of volcanoes. A volcanic event occurs when there is a sudden or continuing release of energy caused by near-surface or surface magma movement. The energy can be in the form of earthquakes, gas-emission at the surface, release of heat, explosive release of gases and the non-explosive extrusion or intrusion of magma. An event could be non-destructive without release of solids or magmatic liquid, or if there is anything to destroy, could be destructive with voluminous lava flows or explosive activity. A volcanic event can include an eruptive pulse usually an explosion with an eruption plume, but also non-explosive surges of lava. A pulse may last a few seconds to minutes. Then an eruptive phase that may last a few hours to days and consist of numerous eruptive pulses that may alternate between explosions and lava surges. Or a single eruption or eruptive episode, composed of several phases that may last a few days or even months.             Some volcanoes may form completely within a few weeks or months. Others, such as shield volcanoes and composite volcanoes may show high order discontinuities such as major chemical changes, volcano-tectonic events like caldera collapse, or long erosional intervals.
       During a single eruption, styles of activity and types of products may change within minutes or hours, depending upon changes in magma composition, volatiles, or other magma chamber and vent conditions. Volcanic eruptions and eruptive phases are traditionally classified according to a wide range of criteria. Many have been given names from volcanoes where a certain type of behavior. Common eruptions types are Plinian, Hawaiian, Strombolian, and Vulcanian.  Volcanoes occur when magma makes its way to the surface of the earth. One type of volcanic eruption is a rift eruption. A rift eruption occurs at a diverging boundary. They are non-violent eruptions, and mafic magma is usually involved. Subduction eruptions occur at a subduction boundary. They are usually very violent, and involve felsic magma. Hot Spot eruptions occur in the middle of a plate, not at a boundary. They are non-violent. Magma is molten rock found in the mantle. Mafic magma is low in silica, dark colored magma and does not trap gases, forms basalt. Felsic magma is rich in silica, light colored magma, ... more

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