comprehension september grade 6

Magnetic Resonance Imaging (commonly known as an MRI) is a way to make pictures of organs and structures inside the body using a magnetic field and pulses of radio wave energy. It works because the human body is composed mostly of water, and the nuclei of Hydrogen ― one of the molecular components of water ― become aligned in a magnetic field. When the magnetic field is turned on, the protons in the nucleus of an atom flip the direction in which they spin; when the field is turned off, the protons gradually return to their normal spin, a process called precession. This process of the protons returning to their normal spin produces a radio signal that can be detected by the scanner and converted into a digital image. An MRI can show things that cannot be shown by other procedures such as an X-ray, an ultrasound, or a computer tomography (CT) scan. It can detect problems like tumors, internal bleeding, injury, diseases of the blood vessel, problems with spinal discs, or infection. It is also preferable to a CT scan, as it produces no ionizing radiation. The standard MRI is a closed machine that contains a strong magnet. The patient lies on their back on a table, and the head, chest, and arms may be strapped down, as it is important that the patient lie completely still. The table slides into the enclosed space containing the magnet. The area to be scanned may be wrapped in a device called a coil, and depending on the reason for the scan, a special strap that senses breathing or heartbeat is sometimes used to ensure the machine takes the scan at the optimal time. An MRI has no known harmful effects, though the powerful magnet may affect pacemakers, artificial limbs, or other medical devices containing iron.

1) _________ An MRI uses a magnetic field and radio waves to create images.

______________2. The MRI works because the human body is made up of mostly oxygen.

______________3. It is the protons returning to their normal spin that allows am image to be created.

______________4. An MRI is just another way to show what an X-ray shows.

______________5. An MRI does not expose the subject to radiation

______________6. An MRI has many harmful side effects.

Amelia Earhart was already famous for being the first woman to fly across the Atlantic. But in 1937, determined to be the first woman to fly around the world and with Fred Noonan as her navigator, Earhart took off from Miami, Florida. She got as far as New Guinea in the South Pacific, intending to fly to Howland Island in the Pacific Ocean the next morning. But after they took off from New Guinea, they disappeared. Neither Earhart nor Noonan were ever heard from again, and they were presumed dead. The official investigation concluded that their plane crashed somewhere in the Pacific Ocean. No remains were ever found. But in 2017, a mysterious photograph was discovered in an old file in the National Archives, suggesting that the aviator and her navigator had, in fact, survived the crash. The photo, which experts have declared to be both legitimate and undoctored, is said to show both Earhart and Noonan. An investigative team working for the History Channel suggested that the photo may have been taken “by someone who was spying for the U.S. on Japanese military activity in the Pacific.” The Japanese government, contacted for a statement, indicated that they had no record of Earhart or Noonan ever having been taken prisoner. Did Earhart and Noonan survive? If they did, why wouldn’t they have made some attempt to contact friends or family back home? Even if it does turn out that the flying duo survived their crash, the mystery of what happened to Amelia Earhart is far from over.

Why was Amelia Earhart “already famous?

What was Amelia Earhart determined to do?

What was the last place that Earhart and Noonan were seen?

What did the official investigation conclude?