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Changing Weather Is Often A Result Of The Earth S Rotation

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Changing Weather Is Often A Result Of The Earth's Rotation

Relentless interaction between the heat of the sun and the earth's atmosphere is behind weather development. When heating is not uniform all through a complex system of wind flows is generated. Air circulation produced by the atmosphere subjected to solar heat has three main forms.

The circulation of air near the tropics is called Hadley cells named after George Hadley, the scientist. Between 23.5 degrees latitude south and north, i.e., in the tropics the air rises having been heated. As it meets the tropopause it fans out while at about thirty degrees south and north a great part of this air drops back towards the ground. When it drops it removes air while to complete the cycle the removed air returns back towards the equator.

From thirty to sixty degrees north and south similar circulation known as Ferrel cells occur while in the polar regions polar Hadley cells flow.

But a straight north-south direction these air-flows do not follow and that is interesting enough. What is known as Coriolis effect is due to the earth's rotation. In the Northern and the Southern Hemisphere any fluid or object that moves freely seems to turn to the left or right respectively to the direction of motion. Since Gustavo-Gaspard de Coriolis first identified it in 1835 the Curiolis effect is named after him.

To an area of low pressure air tends to flow but deflection of air in this case is due to the Coriolis effect. By creating a circular movement, or a cyclonic flow an equilibrium it establishes ultimately. In the Northern Hemisphere air flows in a counter-clockwise direction in low pressure areas while in the Southern Hemisphere the direction is clockwise. But around high pressure areas the air flow is just the reverse to it.

Had there been no rotation of the earth the pressure would have been equalized fast since air flow of air would be quick and along straight lines. At the equator the Coriolis effect is precisely zero. For this reason, on the equator cyclones hardly occur or travel to the same. Most logically at the poles Coriolic effect reaches its maximum.
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BONUS : Chaos In The Kitchen? Tips For Getting Your Kids To Eat

If picky eating were an Olympic sport, would your child be the gold medal winner?

If so, you're not alone. Many parents find that their children consistently place first in the "you can't make me eat that" category and excel at pushing food around their plate.

How can you turn mealtime into a family-friendly hour as opposed to an all-out war? Here are some suggestions:

* Be patient. Don't try to force your children to eat if they refuse to finish their meal. By creating drama in the kitchen, you set a bad tone for the future. Kids will automatically think of mealtime as a negative experience and will only become more reluctant when it comes to eating. Be persistent by offering a variety of foods along with those you know they like. As new foods become familiar, your children will be more likely to try them.

* Remember, timing is everything. In the midst of a dinnertime showdown, children don't want to hear all of the reasons why they should eat the food sitting on their plate. Try to incorporate nutrition education during other parts of the day. Bring up the issue during story time, play time or television time - not in the middle of a temper tantrum over broccoli.

* Look for "fun" foods. Scan the supermarket for foods that you know kids would enjoy. Want to get your kids to try seafood? Products like Gorton's Popcorn Fish, bite-size fish coated in a crispy batter, appeal to children because of their fun shape and kid-friendly taste. Serving fish in this manner early on will encourage your children to keep an open mind about eating different kinds of seafood in the future.

* Set an example. While the focus may be on getting your kids to eat what is on their plate, it helps to look at your own eating habits as well. Children learn by example and often want to eat what they see grown-ups eating. Make a point to let them see you eating and enjoying the same foods you are serving them. - NU
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