most popular pets in the world
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dog -- Encyclopædia Britannica Online School Edition - 0 views
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loyalty
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devotion
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man's best friend
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faithful companion to either rich or poor
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domesticated
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endeared themselves to many over the years
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brave
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protect
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heroic
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source of genuine delight to their owners
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Child development - Wikipedia, the free encyclopedia - 0 views
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The capacity to learn, remember, and symbolize information, and to solve problems, exists at a simple level in young infants, who can perform cognitive tasks such as discriminating animate and inanimate beings or recognizing small numbers of objects
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Abilities for physical movement change through childhood from the largely reflexive (unlearned,involuntary) movement patterns of the young infant to the highly skilled voluntary movements characteristic of later childhood and adolescence
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Physical growth in stature and weight occurs over the 15-20 years following birth, as the individual changes from the average weight of 7 1/2 pounds and length of 20" at full-term birth to full adult size. As stature and weight increase, the individual's proportions also change, from the relatively large head and small torso and limbs of the neonate, to the adult's relatively small head and long torso and limbs.
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Newborn infants do not seem to experience fear or have preferences for contact with any specific people.By about 8-10 months, they go through a fairly rapid change and become fearful of perceived threats; they also begin to prefer familiar people and show anxiety and distress when separated from them or approached by strangers
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Dyslexia is a significant topic in child development as it affects approximately 5% of the population (in the western world). Essentially it is a disorder whereby children fail to attain the language skills of reading, writing and spelling commensurate with their intellectual abilities.
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Grolier Multimedia Encyclopedia - 0 views
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basic laws of physics dictate that energy is conserved and can only be changed from one form to another or into matter.
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Fuel, on the other hand, is the accumulation of matter and therefore represents a store of energy.
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released in the form of heat when the fuel is burned in chemical or nuclear reactions
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cannot be reversed to regenerate the original fuel mass
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a fuel problem does exist
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If the supply of fuel is finite, not only will there be no energy supply when the fuel is exhausted
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Finite means: a form of a verb that can occur as the head of a sentence. In Sam wants to leave, wants is finite, leave is non-finite.
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all other processes that depend on it will cease
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Several factors combine to make the problem an urgent one
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World population
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demand for energy will also increase
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coal, oil (petroleum), natural gas, uranium, and fuel wood—is limited and insufficient to sustain rapid rates of development.
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debate about the exact length of time available before the effects of a worldwide shortage become apparent
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shortage will occur.
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geothermal energy, hydroelectric power, peat, ocean thermal energy, solar energy, tidal energy, wind power, and fuel wood.
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replenish themselves naturally in a relatively short time and will therefore always be available.
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Renewable energy resources
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indirectly responsible for many other renewable energy sources.
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ocean currents and winds are results of the uneven distribution of solar radiation over the Earth's surface
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winds in turn produce waves whose energy can be utilized
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windmills and wind power
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ocean thermal energy, solar heating of the upper layers of the ocean produces temperature gradients that can be harnessed to generate electricity
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Sun also powers the hydrologic cycle, in which ocean water is evaporated, transported over the continents, and precipitated as rain or snow to form rivers
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flow energy produces hydroelectric power.
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energy locked in such renewable fuel sources as wood and peat is derived from the Sun by the process of photosynthesis.
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renewable energy source is geothermal energy
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arises through the leakage of heat from the Earth's interior to the surface
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over the entire surface of the Earth at a very low average rate, leakage is much higher in certain locations.
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Yellowstone National Park
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Iceland, Italy, and New Zealand.
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possible to tap the heat and use it for human purposes.
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Nonrenewable resources originate from two processes: (1) photosynthesis, which occurred many millions of years ago, followed by the fossilization of the plant and animal life that resulted, and (2) the formation of the Earth itself.
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fossil fuels—coal, oil (petroleum), and natural gas;
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produced the fuels for nuclear energy, such as uranium for fission and lighter elements for fusion
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irreplaceable fuels represent an energy capital that must be invested wisely.
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A cleaner-burning fuel than oil, natural gas seemed to be in abundant supply at the turn of the 21st century and, with the greatly enlarged network of gas pipelines, was rapidly growing in use.
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nearly total dependence on fossil fuels and hydroelectricity ensures that efforts to solve energy problems by switching to alternative sources will have to overcome a great deal of inertia, both economic and psychological.
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sources as solar power, wind power, and synthetic fuels suffer from the serious drawback that few major installations now exist.
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handicapped by the engineering problems of converting the energy to a form useful to human beings.
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solar energy reaches the top of the atmosphere in amounts 10,000 times greater than all human production of energy, it reaches the Earth's surface at rates of only about 80 to 250 W/m2, and considerably less on cloudy days.
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arge-scale system based on solar-collector panels will be physically huge, causing problems of maintenance and land use
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Wind power, wave power, and ocean-thermal-generation sources suffer from similar difficulties
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Even though there are some difficulties with working towards the alternative fuels, it may prove to be more efficient for smaller things (heat and power to small communities or single buildings) in the long run
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D-Day 1944 - 0 views
Invasion of Normandy, June 6, 1944 - 0 views
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Bat World - 0 views
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Bats are not flying mice; they are not even remotely related to rodents. Bats are such unique animals that scientists have placed them in a group all their own, called 'Chiroptera’, which means hand-wing. Bats are grouped with primates and lemurs in a grand order called Archonta.
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Bats are not blind. Most bats can see as well as humans. Fruit bats have eyesight that is adapted to low-light, much like cats. Fruit bats also see in color.
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If a bat swoops toward you, it’s probably after the mosquito that is hovering just above your head - not your hair.
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Bats are not ugly or dirty. Most bats have very cute faces, some even resemble deer, rabbits, and little Chihuahuas. Like cats, bats spend an enormous amount of time grooming their fur, keeping it soft and silky.
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Not all bats are vampires. Of the world’s 1100+ species, only three are vampire bats limited mostly to Latin America. Vampire bats are very small (about the size of a package of M&Ms). Vampire bats do not attack humans or suck our blood; they prefer to get their teaspoon-sized meals from other animals.
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Bats are wild animals, and all wild animals can be dangerous. Additionally, grounded bats are more likely to be sick so they should never be rescued bare-handed.
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Bats are shy, gentle, and intelligent. They are among the slowest reproducing animals on earth. Most bat species have only one live young per year.
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Biomes - Living Worlds :: Home / Main - 0 views
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Panda - Enchanted Learning Software - 0 views
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Chinese people call the panda "Da xiong mao,"
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"giant bear cat"
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symbol of peace in China
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Female pandas are called sows
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males are called boars
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young are called cubs
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Most bears' eyes have round pupils
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giant panda, whose pupils are vertical slits
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Pandas have very good eyesight
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largest pandas grow to be about 250 pounds
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5.25 to 6 feet (1.6 to 1.8 m) long
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weighs about 220 pounds
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40 pounds (18 kg) of food each day
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Bamboo is very low in nutrition
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cannot digest it very well
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12 hours every day
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throat and stomach have extra-tough linings to protect them from the tough food
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captivity (zoos and breeding centers), pandas eat bamboo, rice cereal, carrots, apples, and sweet potatoes
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usually eat while sitting in an upright positio
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strong teeth and jaws are very important to a panda's survival
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Giant pandas have large molars (flat teeth used for crushing food)
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few sharp teeth which they use to bite tough bamboo stalks
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Pandas have 42 teeth
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very thick, oily, woolly fur
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two types of hairs
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long, thick, coarse hairs
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fur is waterproof
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shorter, fine, dense underfur
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endangered species
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roughly 1,000-1,500 pandas living in the wild (in China)
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120 living in zoos and breeding centers around the world
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extremely vulnerable to extinction because of humans
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mostly shy, solitary animals
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mostly silent, but they can bleat!
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11 different calls, four of which are only used during mating
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live longer in captivity than in the wild
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Unlike many other bears, pandas cannot walk on their hind legs
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do not hibernate since their food is available all year long
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During the cold winter months, giant pandas go to lower altitudes where it is a bit warmer
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don't seem to have permanent dens
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very slow reproductive rate
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mate in the spring
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give birth between 95 and 160 days after mating
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Japanese history: Postwar - 0 views
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After World War II had ended, Japan was devastated. All the large cities (with the exception of Kyoto), the industries and the transportation networks were severely damaged. A severe shortage of food continued for several years.
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The whole operation was mainly carried out by the United States.
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Over 500 military officers committed suicide right after Japan surrendered, and many hundreds more were executed for committing war crimes.
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A new constitution went into effect in 1947: The emperor lost all political and military power, and was solely made the symbol of the state.
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Critics started to grow when the United States acted increasingly according to her self interests in the Cold War, reintroduced the persecution of communists, stationed more troops in Japan, and wanted Japan to establish an own self defence force despite the anti-war article in the constitution.
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With the peace treaty that went into effect in 1952, the occupation ended. Japan's Self Defence Force was established in 1954, accompanied by large public demonstrations. Great public unrest was also caused by the renewal of the US-Japan Security Treaty of 1960.
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After the Korean War, and accelerated by it, the recovery of Japan's economy flourished.
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Japan's relations to the Soviet Union were normalized in 1956, the ones to China in 1972.
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Dead dog as art - Opinion - 0 views
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When asked to provide an explanation for his actions Vargas claimed that this so called "art exhibit" was his way of paying respect to his friend who had died recently after he was attacked by two Rottweilers guarding a shop which his friend had been burglarizing.Upon reading through a few of the comments and blogs, I found that there were several threats against the artist, saying that he should be tortured and allowed to die just as the dog. However, no one mentions anything about the spectators. I am in no way defending Vargas's actions, I am however disgusted at the idea that no one attempted to rescue the dog. Pictures show people standing close enough to get a good look yet far enough away to escape any responsibility for the suffering the dog was clearly enduring. The stray dog is more alive today then he was the day he stood as a spectacle of suffering and selfishness. This story has gotten the attention of people everywhere, and rightfully so
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tell alittle bit of the reason the so called artist tied up the dog and tell that the dog is still living today
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What everyone is forgetting is that the controversy around this is exactly what he was getting at with his statement everyone cares about a dog that was going to starve on its own anyways, nobodys cares about the millions of people starving around the world every day or even the dogs starving in his home country its like everyone just saw the words starving dog and immediatly jumped to death threats
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other people believe that what the so called artist did was a good way to make a statement
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tell alittle bit of the reason the so called artist tied up the dog and tell that the dog is still living today
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The History Of Army Skydiving « Sky Diving Weblog - 0 views
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Today we enjoy skydiving as a breathtaking leisure sport, but its origins lie within the army. The history books are chock full of dates and occurrences where skydiving has played an important part.
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Army skydiving had a big role to play in the Second World War, when paratroopers dropped into enemy zones to fight
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Skydiving is a natural sport to develop from army training.
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many expert skydivers found their passion after joining the army.
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So it seems army skydiving has gone from being a skill developed to get into enemy territory quickly and efficiently, to a spectator sport appreciated by the masses.
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Blue Sky - Why is the Sky Blue? - 0 views
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end of the spectrum are the reds and oranges. These gradually shade into yellow, green, blue, indigo and violet. The colors have different wavelengths, frequencies, and energies. Violet has the shortest wavelength in the visible spectrum. That means it has the highest frequency and energy. Red has the longest wavelength, and lowest frequency and energy. LIGHT IN THE AIR Light travels through space in a straight line as long as nothing disturbs it. As light moves through the atmosphere, it continues to go straight until it bumps into a bit of dust or a gas molecule. Then what happens to the light depends on its wave length and the size of the thing it hits. Dust particles and water droplets are much larger than the wavelength of visible light. When light hits these large particles, it gets reflected, or bounced off, in different directions. The different colors of light are all reflected by the particle in the same way. The reflected light appears white because it still contains all of the same colors. Gas molecules are smaller than the wavelength of visible light. If light bumps into them, it acts differently. When light hits a gas molecule, some of it may get absorbed. After awhile, the molecule radiates (releases, or gives off) the light in a different direction. The color that is radiated is the same color that was absorbed. The different colors of light are affected differently. All of the co
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d after Lord John Rayleigh, an English physicist, who first described it in the 1870's.) WHY IS THE SKY BLUE? The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by t
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As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light reaches your eyes. The color of the sky near the horizon appears paler or white.
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THE BLACK SKY AND WHITE SUN On Earth, the sun appears yellow. If you were out in space, or on the moon, the sun would look white. In space, there is no atmosphere to scatter the sun's light. On Earth, some of the shorter wavelength light (the blues and violets) are removed from the direct rays of the sun by scattering. The remaining colors together appear yellow. Also, out in space, the sky looks dark and black, instead of blue. This is because there is no atmosphere. There is no scattered light to reach your eyes. WHY IS THE SUNSET RED? As the sun begins to set, the light must travel farther through the atmosphere before it gets to you. More of the light is reflected and scattered. As less reaches you directly, the sun appears less
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The sky around the setting sun may take on many colors. The most spectacular shows occur when the air contains many small particles of dust or water. These particles reflect light in all directions. Then, as some of the light heads towards you, different amounts of the shorter wavelength colors are scattered out. You see the longer wavelengths, and the sky appears red, pink or orange.
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RE ABOUT:THE ATMOSPHERE WHAT IS THE ATMOSPHERE? The atmosphere is the mixture of gases and other materials that surround the Earth in a thin, mostly transparent shell. It is held in place by the Earth's gravity. The main components are nitrogen (78.09%), oxygen (20.95%), argon (0.93%), and carbon dioxide (0.03%). The atmosphere also contains small amounts, or traces, of water (in local concentrations ranging from 0% to 4%), solid particles, neon, helium, methane, krypton, hydrogen, xenon and ozone. The study of the atmosphere is called meteorology. Life on Earth would not be possible without the atmosphere.
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d increases with increasing altitude. The increase is caused by the absorption of UV radiation by the oxygen and ozone. · The temperature increase with altitude results in a layering effect. It creates a global "inversion layer", and reduces vertical convection. Mesosphere - Extends out to about 100 km (65 miles) · Temperature decreases rapidly with increasing altitude. Thermosphere - Extends out to about 400 km ( 250 miles)
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hes the Earth, 30% is reflected back into space by clouds and the Earth's surface. The atmosphere absorbs 19%. Only 51% is absorbed by the Earth's surface. We are not normally aware of it but air does have weight. The column of air above us exerts pressure on us. This pressure at sea level is defined as one atmosphere. Other equivalent measurements you may hear used are 1,013 millibars, 760 mm Hg (mercury), 29.92 inches of Hg, or 14.7 pounds/square inch (psi). Atmospheric pressure decreases rapidly with height. Pressure drops by a factor of 10 for every 16 km (10 miles) increase in altitude. This means that the pressure is 1 atmosphere at sea level, but 0.1 atmosphere at 16 km and only 0.01 atmosphere at 32 km. The density of the lower atmosphere is about 1 kg/cubic meter (1 oz./cubic foot). There are approximately 300 billion billion (3 x 10**20, or a 3 followed by 20 zeros) molecules per cubic inch (16.4 cubic ce
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ers). At ground level, each molecule is moving at about 1600 km/hr (1000 miles/hr), and collides with other molecules 5 billion times per second. The density of air also decreases rapidly with altitude. At 3 km (2 miles) air density has decreased by 30%. People who normally live closer to sea level experience temporary breathing difficulties when traveling to these altitudes. The highest permanent human settlements are at about 4 km (3 miles). LAYERS OF THE ATMOSPHERE The atmosphere is divided into layers based on temperature, composition and electrical properties. These layers are approximate and the boundaries vary, depending on the seasons and latitude. (The boundaries also depend on which "authority" is defining them.) LAYERS BASED ON COMPOSITION Homosphere
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LAYERS BASED ON TEMPERATURE Troposphere - Height depends on the seasons and latitude. It extends from ground level up to about 16 km (10 miles) at the equator, and to 9 km (5 miles) at the North and South Poles. · The prefix "tropo" means change. Changing conditions in the Troposphere result in our weather. · Temperature decreases with increasing altitude. Warm air rises, then cools and falls back to Earth. This process is called convection, and results in huge movements of air. Winds in this layer are mostly vertical. · Contains more air molecules than
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· The air is very thin. · The prefix "strato" is related to layers, or stratification. · The bottom of this layer is calm. Jet planes often fly in the lower Stratosphere to avoid bad weather in the Troposphere. · The upper part of the Stratosphere holds the high winds known as the jet streams. These blow horizontally at speeds up to 480 km/hour (300 miles/hour) · Contains the "ozone layer" located
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gen we need to breath. But it also serves other important functions. It moderates the planet's temperature, reducing the extremes that occur on airless worlds. For example, temperatures on the moon range from 120 °C (about 250 °F) in the day to -170 °C (about -275 °F) at night. The atmosphere
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sounds good, by the way am i annoying you with my sticky note??? well, TOO BAD!!!!!!
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Grolier Online - 0 views