... : For seeing, this is the only visible electromagnetic wave. Ultraviolet: For suntans X-Rays: for seeing broken bones. Gamma Rays: For treating cancer. Radio Waves To the Victorians, the telegraph was their equivalent to the internet; it allowed immediate communication to anyplace possible around the world. Nowadays we use radio signals ... and send emails and faxes. Some can even display whole movies sent to the phone. Infrared (IR) There are many uses for infrared. Infrared (heat) is given off by humans. This can be very useful, for example, in earthquakes; victims buried under rubble...

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• Grade Level: High School

... NREM) sleep Stages of NREM sleep o stage 1 Falling Sleep - transition state between sleep and wakefulness - eyes begin to roll slightly - consists mostly of theta waves (high amplitude, low frequency (slow) - brief periods of alpha waves, similar to those present while awake - lasts only for a few minutes before moving on to next stage-very short stage, usually occurring a few minutes after bedtime ... irregular - the heart rate begins to slow, and muscles relax - easy to awaken and may not realize that he or she has been asleep o stage 2 Deeper stage - peaks of brain waves become higher...

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... same way as echo sounding. Ultrasound penetrates the human body well, but some of the original wave is reflected off tissues, bones etc. The returned waves are used to build a picture of inside the body, for example in scans to check on babies while there are still in the mothers' womb ... in cardiology to detect heart damage and in ophthalmology to detect retinal problems. It is also used to heat joints, which relives some arthritic joint pain, and for such procedures as lithotripsy, in which shock waves break up kidney stones, eliminating the need for surgery. Ultrasound is noninvasi...

• Word Count: 711
• Approx Pages: 3
• Grade Level: High School

The hot Australian sun was the enlightenment of my perfect summer's day. The dense heat prompted the urge for me to immerse my body in the cool crystal clear waters of north Curl Curl Beach. The decision was not difficult to take the trip. We ... sand were felt as we buried our feet with each step we took . The crashing waves hit my back and provided a cool sensation that refreshed me and my senses. Although the waves weren't so good, I suppose you could still catch in a bit of body boarding whilst the waves weren't crashing down on the shallow waters. I and my sister also decided to catch u...

• Word Count: 340
• Approx Pages: 1
• Grade Level: High School

... rubbed another layer of sunscreen on and laid down making sure not to let our hair touch the sand. After a couple hours of flipping every fifteen minutes, I felt my body heat rising along with the temperature. I slowly arose and rushed towards the copper-like ocean. I didn't stop at the shoreline. I jogged in the water until I reached waist height and stopped. For ... a moment I let the cool currents flow swiftly across my body while letting the waves splash down and hit across my face. I sank myself into the metallically cool water and let the force exerted from the waves combined with...

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• Grade Level: High School

... , touched, smelled, heard, and even tasted was a sweet part of my paradise. All these characteristics are what make my paradise the beach. As I walk along the shore I hear the thunderous waves crashing amongst one another. The swift breeze of cool, fresh air splashing in my face from all over is a most heavenly feeling. As I continue walking I hear the birds cawing for ... ! All these things and so much more is what make the beach such a special place for me. With my feet in the sand I feel the warmth of the heat reflecting against my skin. The waves brush up against my legs only to cool ...

• Word Count: 488
• Approx Pages: 2
• Grade Level: High School