Do You kNOW ?

Question :
What is the president’s job?
Answer :
The president’s chief duty is to protect the Constitution and enforce the laws made by Congress. However, he also has a host of other responsibilities tied to his job description. They include: recommending legislation (laws) to Congress, calling special sessions of Congress, delivering messages to Congress, signing or vetoing legislation, appointing federal judges, appointing heads of federal departments and agencies and other principal federal officials, appointing representatives to foreign countries, carrying on official business with foreign nations, acting as commander in chief of the armed forces, and granting pardons for offenses against the United States.

Question :
What causes hiccups?
Answer :
A hiccup is a noise that your body makes when your diaphragm, the muscle barrier between your stomach and lungs, gets irritated and has spasms. The "hic" part of the sound is caused when air is sucked into your lungs, and the "cup" part of the sound happens when a special flap called the epiglottis, located between your tongue and vocal cords, slams closed over your windpipe. Your diaphragm can become irritated from eating too much food, which causes an enlarged stomach to press against the wall of the muscle. Your diaphragm can also become irritated from lifting a heavy object or from breathing in too much air, which affects your normal breathing pattern. Hiccups may last a minute or two, but generally go away with time. Holding your breath, drinking a glass of water, or having someone scare you generally does not work to get rid of hiccups, since your diaphragm needs time to relax again.

Question :
Can mountains grow and shrink?
Answer :
Yes. Mount Everest, Earth’s highest summit, continues to rise. The 29,035-foothigh (8,850-meter-high) mountain grows about 0.16 inch (0.41 centimeters) per year. That’s because the Himalayas, the mountain range that includes Mount Everest, was formed 50 million years ago when the Eurasian and Indian plates collided. Today, the plates continue to press against each other, causing the mountains in the range to rise. Other mountains shrink. For example, Mount St. Helens, a volcano in Washington State, erupted on May 18, 1980. The mountaintop was blasted into volcanic ash, shrinking the summit height from 9,677 feet (2,950 meters) to 8,364 feet (2,550 meters).

Question :
What does my brain do, besides think?
Answer :
The brain is the body’s command center; everything we do—eating, talking, walking, thinking, remembering, sleeping—is controlled and processed by the brain. As the most complex organ in the human body, the brain tells us what’s going on outside our bodies (whether we are cold or hot, for instance, or whether the person we see coming toward us is a friend or a stranger) as well as what’s going on inside our bodies (whether we have an infection or a broken bone, or whether we feel happy or sad). The key to the body’s nervous system, the brain contains between 10 billion and 100 billion nerve cells, or neurons. Neurons combine to form the body’s nerves, thin cords that spread from head to toe and all parts in between. Neurons take in and send out electrical signals, called impulses, that control or respond to everything your body does and feels. The brain is like a very busy, high-speed post office, constantly receiving messages and sending them out all the time; it handles millions of nerve impulses every second.

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