Congress wanted a strong central government. At that time, Washington D.C., between Virginia and North Carolina, had been a focal point of the American Revolution. The Continental Congress had met there before the war.
Philadelphia was an important early American city and was the logical choice as the new country's capital because of a roughly central location in the U. S. However, government of Pennsylvania failed to protect the federal government.
There was an early problem between congress and the American army. Therefore, the continental congress never met in Philadelphia and it ruled out Philadelphia as the capital city in United States.
How Washington D.C. became the capital of United States is an intriguing story. Since in 1783 some soldiers interrupted a meeting of Congress in Philadelphia，it decided to create a completely new and independent area as the capital city.

The lecture about phonics method is discussed by going into details on individual learning methods. A student who learns to read with the phonics method might have a smaller vocabulary than normal.
By using flashcards properly, the students learn the letters and which sounds each one makes. Teachers, first, teach their students the alphabet and then teach the students how letters can blend together.
The professor would focus on two of four methods of teaching reading: phonics and look-and-say. The phonics method renders students the ability to teach him or herself new words, while the loo-and-say methods may use flashcards.
Everyone needs to know how to read and there are four primary ways to teach reading. Specifically, students do not learn the alphabet with the phonics method because it teaches students new word slowly.

White blood cells are responsible for fighting pathogens inside the body. Pathogens can enter bodies and cause them to become sick. However, white blood cells are not always effective.
There are two major types of immune that organisms have: innate and adaptive. The skin and mucus are part of the adaptive immune system.
The way that the immune system works is remarkably complex. Skin, the first line of defense, can keep foreign objects out of the body, while white blood cells, acting like soldiers fighting invaders, can fight pathogens in the body.
The skin, the body's first line of defense, helps animals fight off diseases. Also, the mucus in the nose prevents airborne foreign bodies—many of which do very little good—from entering the body.

Mosquitoes cause some problems. Sucking animal’s blood enables female mosquitoes to reproduce. Mosquitoes kill more people than any other creature on Earth and the way to control them is difficult.
The place that mosquitoes live is dark and mysterious and it also protects them from their predators. However, DDT, an effective way to eliminate mosquitoes, was now banned in many countries.
The best way to exterminate mosquitoes in high insects environment is the kill their eggs first. They lay their eggs in stagnant water, like in swamps. So draining these areas can control them.
Mosquitoes suck blood from various animals by a long feeder in its mouth to provide them with nourishment. So to control them, DDT, an insect killer, must be used many times to be successful.

Tigers have sharp, curved teeth for slicing meat, while horses’ teeth are flat for grinding plants. Similarly, amongst dinosaurs, allosaurs have sharp, straight, conical teeth that were well adapted for crushing the bones of other dinosaurs, while hadrosaurs had flat teeth for eating grass and similar materials.
We can tell what kind of food an extinct animal such as a dinosaur ate by examining its teeth and jaw and comparing them with present-day animals. Sharp, serrated teeth imply that it was a carnivore, whereas flat surfaces for grinding tough fibres suggest a herbivorous diet.
Hadrosaurs, like horses, were adapted to a vegetarian diet. Their teeth were flat and designed for grinding tough material such as plants, though they were sometimes ground down to a flat surface. This led to problems with dentition. Allosaurs, on the other hand, like tigers, had sharp teeth for eating meat.
Researchers have found that dinosaurs had the same kinds of diet-related issues with their dentition as modern-day animals. Meat-eaters in particular had tooth cavities due to bacteria in their food. However, herbivores also had problems due to their teeth being ground down as they chewed on tough plant fibres. Re-Start

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