Breathing is the process of moving air into and out of the lungs. The process depends on a muscle called the diaphragm. This is a large, sheet-like muscle below the lungs. Inhaling, or breathing in, occurs when the diaphragm muscle tightens. This increases the size of the chest. This too decreases air pressure inside the lungs. This action allows air and gases to enter the lungs. Exhaling, or breathing out, occurs when the diaphragm muscle relaxes. This decreases the size of the chest. This increases air pressure inside the lungs. This action allows for air to leave the lungs. When you inhale, air enters the respiratory system through your nose and ends up in your lungs, where gas exchange with the blood takes place. What happens to the air along the way? In the nose, mucus and hairs trap any dust or other particles in the air. The air is also warmed and moistened. Next, air passes through a passageway that is connected to the windpipe. The air then finds its way to the lungs. In the chest, the windpipe splits so that air enters both the right and left lung.
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QUESTION: What happens to the size of the chest when the diaphragm muscle relaxes?

You know that friction also causes heat. Think about when you rub your hands together. It is friction that makes them warm. But why does this happen? Friction causes the molecules on rubbing surfaces to move faster. Faster moving particles have more heat energy. Heat from friction can be useful. Can you think of other places where you might find friction? Friction also lets you light a match. Heat from friction can also cause problems. It can cause a car to overheat. To reduce friction, oil is added to the engine. Oil coats the surfaces of moving parts. This coating of oil makes them slippery. When things are slippery there is less friction. Have you ever seen a sign that says, slippery when wet? This too has to do with friction. Water, like oil, can reduce friction. The wet surface may allow your shoes to slide more easily.
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QUESTION: Are you likely to experience more friction walking on a surface covered in oil or water than on a dry surface?

Dylan and Jez are two orphans who meet in their twenties and vow to achieve their shared childhood dream of living in a stately home . In pursuit of this dream they spend their days living in a disused gas holder , spending as little money as possible and conning the upper classes out of their riches . During one of their biggest cons , their lives are touched by Georgie , who needs money to save the Down's syndrome foundation that her brother attends . When a con goes wrong , the two find themselves in gaol to be released only after their entire fortune is rendered useless because of a recall of 50 notes . It is down to an elaborate plan involving Dylan , Jez and Georgie , to break them out of gaol in order to save their dream . The film , in essence , is part Ealing comedy , part underdog farce with a sequence of madcap adventures set against a striking soundtrack by contemporary Britpop artists . Unlike straight rom-coms or mainstream comedies of the period Shooting Fish contained a generous blending of fact and fantasy .
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QUESTION: Where were Dylan and Jez held?

If you have a mass of 50 kg on Earth, what is your weight in newtons? An object with more mass is pulled by gravity with greater force. Mass and weight are closely related. However, the weight of an object can change if the force of gravity changes. On Earth, the force of gravity is the same everywhere. So how does the force of gravity change? It doesnt if you stay on Earth. What if we travel to another planet or moon in our solar system? Look at the photo of astronaut Edwin E. Aldrin Jr. taken by fellow astronaut Neil Armstrong in the Figure. They were the first humans to walk on the moon. An astronaut weighs less on the moon than he would on Earth. This is because the moons gravity is weaker than Earths. The astronauts mass, on the other hand, did not change. He still contained the same amount of matter on the moon as he did on Earth. If the astronaut weighed 175 pounds on Earth, he would have weighed only 29 pounds on the moon. If his mass on Earth was 80 kg, what would his mass have been on the moon? [Figure 3]
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QUESTION:
How does the force of gravity change?