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"Risky Rainbow"

Extracts from this document...

Introduction

 “Risky Rainbow”

Ultraviolet

Ultraviolet (UV) radiation is the least damaging type of dangerous radiation.  The sun is the main natural source of UV.  99% of UV radiation emitted by the sun is absorbed in the Earths ozone layer.  It is also invisible to the human eye.

UV radiation comes with risks.  As it is an ionizing type of radiation it can cause cell damage.  As sun rays emit UV, it most commonly causes skin damage.  This is when the UV rays damage skin cells, and sometimes even killing them.  The damage caused by UV radiation usually only occurs on the surface of the body as it is not very penetrating.

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Middle

attention has been given to UVC rays in the past since they are filtered out by the atmosphere. However, their use in equipment such as pond sterilization units may pose an exposure risk, if the lamp is switched on outside of its enclosed pond sterilization unit.

X-Rays

X-Rays are most frequently used for medical uses.  They are more penetrating than UV, and so the rays can pass through more dense objects.

X-rays are most commonly used to get images of internal organs.  As the rays are penetrative enough to pass through soft tissue, but are blocked by harder tissue such as bones.  X-rays have proven to be very beneficial and are widely used.

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Conclusion

As gamma radiation is so powerful, it can be very dangerous when not handled properly.  As is so penetrative, careful measures have to be taken when handling and gamma source.  A strong gamma source can easily burn flesh.  Even small amounts of gamma exposure have been known to cause serious long term problem such as cancers.  When used in warfare, nuclear bombs have proven to be very devastating.  Such weapons are referred to as “weapons of mass destruction”.  A single bomb has the power to destroy a whole city.

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Here's what a star student thought of this essay

4 star(s)

Response to the question

Overall a very well done piece. The candidate responds to the topic very well and explains each different type of radiation very well. The way the candidate could have improved would have been to include pictures and diagrams to support ...

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Response to the question

Overall a very well done piece. The candidate responds to the topic very well and explains each different type of radiation very well. The way the candidate could have improved would have been to include pictures and diagrams to support text, wider or greater scientific depth and sources and a bibliography.

Level of analysis

The candidate discusses the properties of UV light well and clearly as well as describing its uses. The paragraphs are clearly set out. The candidate could have gone into greater scientific depth about the ionising effects to gain higher marks. The candidate goes on to explain both gamma rays and x rays very well.

Quality of writing

Grammar, punctuation and spelling are all done to a high well. The candidate communicates clearly and sentences are easy to read. The layout and paragraph structure is appropriate and well done.


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Reviewed by skatealexia 02/07/2012

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