Cairo Forum 2010 Education Site

Archive for the ‘Weather’ Category

We know that if the atmosphere did not exist, the earth would go without weather. Imagine for a moment for argument’s sake that the earth has an atmosphere indeed, as it is today, though the sun is absent. Absence of sun would mean absence of weather and that is not only because a frozen solid form the atmosphere will take. Actually the interaction between heat of the sun and our atmosphere builds air masses, while circulation patterns appear due to that. Pressure differences motivate air movements and wind is the end result of the same.

As in case of other materials, the air in the earth’s atmosphere is built of molecules that move about incessantly. Greater is the air pressure where denser concentration of molecules is found. Since air molecules are governed by gravity, the greatest air pressure is found nearest the earth’s surface and with altitude that decreases. The atmospheric pressure at sea level is about 14 and a half pounds on each square inch about which are normally not much conscious.

If air pressure is measured in hectopascals or millibars, normal air pressure ranges from 980 to 1040 hectopascals while on local conditions that is very much dependent.

At different speeds these molecules incessantly move while the speeds depend on temperature, lower the temperature slower is the peed and for higher temperature faster is the speed. The molecules speed up as a mass of air is heated and that results in expansion of air. The density of the molecules decreases as expansion takes place and thereby the air mass becomes lighter. The air mass that has become lighter starts rising now. Convection is the term for the entire process.

All through the world convection is going on constantly in the atmosphere. However neither regular nor uniform is the process. It depends on many local factors whether convection will take place, and if it does at all, how much that will be.

As air rises it cools. Therefore in due course the rising warm air masses get cooled down and to the ground that its starts sinking back. With the rise of air, low pressure results. High pressure is the result where it is sinking. As equilibrium is the goal of atmosphere, air moves from high pressure areas to low pressure ones. Wind is this very movement of air. More the difference between the high pressure and low pressure zones, more forceful winds would be the result.

An elliptical orbit the earth or the third rock from the sun follows and to complete that the time it takes is one year. The time to complete one orbit marks stretch of the earth’s year. Since elliptical is the earth’s orbit, in certain parts of the year it really comes closer to the sun. However that does not cause seasons even though more solar heat the earth receives then.

The earth’s movement is not limited to its travel through space in its own orbit, but it spins also on its axis like a top. In every 24-hour one spin it completes. Alteration between day and night is caused by the earth’s rotation. Weather conditions differ between day and night as is reflected in high and low temperatures and the effect of that is felt on weather patterns too.

On its axis the planet earth is tilted about 23 degrees and that causes really the change of seasons. Due to tilting different parts of the earth come closer to the sun as around the sun the earth travels in its orbit. Therefore during certain parts of the year different parts of the earth receive different amounts of heat.
Read the rest of this entry »

For most of us who have gone through the hallowed halls of learning a.k.a. the busy and sometimes bumpy corridors of a private or public school, home schooling may be a curious and bizarre choice. The idea of not being able to have classmates and interact with them during class or recess or not being able to participate in school organizations like sports and the glee club gives the impression that you are missing out on a lot of great things and experiences.

As a famous book title says “All I really need to know I learned in kindergarten”. You might as well accept that you may have failed to take up these lessons as there is no such thing as kindergarten when you are home schooled all alone. But then again, there are reasons why children are home schooled.

The term home schooling generally refers to teaching and instruction done at home but under the regulation and administration of school associations also known as umbrella schools or correspondence schools. The home school movement was roused by John Caldwell Holt, a teacher, when he published “How Children Fail.” The book raised controversy as it criticized school instruction stressing that the failure of children to learn was not due to the amount of effort and determination to learn but on the setting provided by the schools.
Read the rest of this entry »

Online education has become very popular for many students. It can allow people to obtain a certificate, diploma or even a degree at their own convenience. Yet, despite this many will still not be able to take advantage of it. Why? It’s because most online educational programs are very expensive. Even a certificate can cost you hundreds of dollars. And degrees or diplomas will cost you thousands. This is not good for individuals who need career training yet have lower budgets. However, hope is not lost since there are many companies offering free online training for various occupational skills.

Why would a company offer free online training to Internet surfers? The answer to this question depends on the company’s motives. For example, http://Freeskills.com offers a membership program where visitors get access to hundreds of their training tutorials. They offer a temporary type of free online training to allow people to try their service before actually buying. Other companies, (such as http://E-learningcenter.com), offer free online training for e-mail marketing purposes. In order to have access to their free online training programs, you must provide your name and email address. This subscribes you to their newsletter, which will advertise products or services that may be of interest to you. Then there are the companies or individuals who make free online training content for their websites. They get their revenue from pay-per-click networks they may be a part of. The hope is that by reading their engaging content, you will be on the site long enough to click on one of their ads, allowing them to earn a commission.

Depending on the type of free online training program you decide to use, you may even get a certificate showing you successfully completed your training. This is the case with http://Freeskills.com, though keep in mind their free online training is temporary, (as you will have to pay $149 a year for long-term access). If you are fortunate enough to be able to get a certificate from a free online training program, make sure to make mention of it on your resume under a ‘Certifications’ section. If not you can still make mention of the knowledge you gained from free online training, though you will have to put it in the ‘Skills’ or ‘Qualifications’ section.
Read the rest of this entry »

You can find and choose from over a hundred educational toys in an educational toy catalog. Educational toy catalogs are, indeed, convenient because they spare you time from having to scrutinize the toys you would probably see on the racks in various toy stores. With an online educational toy catalog, you get to decide which toy to purchase for your child, even if you are just sitting down.

Educational toy catalogs do not just advertise any kind of toy; they only commercialize toys that can stimulate your child’s knowledge, at the same time keeping your child’s interest. Just click a specific toy that you want to use to be able to help your child in his or her learning and you will be receiving your order withing forty-eight hours.

You do not have to worry about the quality of the product you have chosen, for catalogs guarantee that their quality will not lessened.

You can choose from various toy categories such as Children’s Books, Creative Plays, Animal Antics and other categories that are sure to pique your child’s curiosity.

You can also avail of Nintendo innovations such as the Gameboy Advance. Educational toy catalogs, especially that of http://www.made-in-china.com/Toys-Catalog/Intellectual-Educational-Toys.html, also include Gameboy Advance cassettes. They have over five hundred games for your Gameboy Advance available. Gameboy Advance consoles are not all about kicking ass and beating different enemies, they also teach your child to think better and more wisely.

Another toy you can purchase from the educational toy catalog the above website has would be Magnetic Toys. You put these toys under daylight, and when it is already nighttime, post it somewhere and you will be able to see the glow.
Read the rest of this entry »