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Photo courtesy Shutterstock. There are four basic mechanisms by which biological evolution takes place. These include mutation, migration, genetic drift, and natural selection. Each of these four mechanisms are capable of altering the frequencies of genes in a population and as a result, they all are capable of driving descent with modification.

Overview: This website is fun and informational providing many items on common questions and articles. There is an updated homepage with photos articles polls, quizzes, and videos. This site aims to explain everything from DNA coding to car transmission problems in simple articles and videos. This site's intended audience is for adults due to the article and links provided. Content: This website provides up to date headings and topics on anything and everything you may want to know. It has tabs for adventure, animals, auto, communication, computer, electronics, entertainment, food, geography, health, history, home and garden, money, people, and science. When you access the site is easy to determine the content and intended audience. There is available information and the authors and researches for the different articles. The information is always constantly being updated and revised so nothing is out of date. The links also are easy to use and work properly. The information and content presented is not biased. All the articles also are valid and have an intended purpose to entertain or inform. Design: The design of howstuffworks.com is easy to use, organized and attractive. The homepage provides many interesting headings, photos, and videos. It is easy to read and very understandable and accessible. The website downloads efficiently and the site is appealing and grabs tor attention. The sites also provide copyright informational the provider is clearly identified. The links are clear and helpful and all the information including the photos videos and articles serve a clear purpose to the site.

Overview The first website that I evaluated was howstuffworks.com. This is an educational website aimed at all age groups that can answer questions about how many different things work. The website offers a variety of different resources. An example of the resources would be how the site teaches skills that everyone should have on topics such as money. Overall, I thought this website was great. It's easy to navigate, and offers many different types of educational materials. Content Not only is this website educational, but it is fun as well. You can come to the website to find out something serious, but you can also come to find out something that's entertaining and fun. The content of the website is easy to understand for any age. Things are explained simply so that you can actually learn at your own pace. It's also easy to find out about the website by clicking on the "about us" link at the bottom of the page. There you can find who sponsors the site and where the content comes from. Design The website is very easy to navigate through. As soon as you get to the homepage you are faced with many different tabs and also a search bar so you can find exactly what you are looking for. In addition to the tabs, there are resources such as videos and blogs that you can get access to through the site.

Overview: This websites main focus is to breakdown simple mechanics of almost anything from how a toaster works to economic policies of the year 2011. This is a source to explore the world around us and understand the things that we encounter and use daily, as well as providing a guide for users ion new endeavors into of learning. Concept: The classification of materials found within this writing is more vast than an encyclopedia. It includes multi-media and interaction presentations to gain the attention of the reader and create a better understanding. The material can become more complex and technical, but can be a resource for any researcher. I would recommend for teachers seeking to better explain concepts or to satisfy the curiosity of a learner. Design: Clean, simple, and precise. This website has a rather challenging searching process, but a pursuing researcher can use the search tool to peruses topics that coincides. The clean layout of the material and explanations make the learning process something to be a part of. As well as a social network application installed to share the knowledge of "how stuff works".

Overview: The purpose of the site is to create a connection of running to health. The intended audience is interested in a long term relationshiop by adding running to a health lifestyle. I liked that the emphasis was more on overall health than overwhelming you with the running, thus puttting running in it's place. Content: The resources provided defining and describing the activity, proper mechanics, advice for beginners, a site on medical clearance for running, and other related searches doctor-patient, teeens, older adults, mental health). I especially enjoyed the video on form running. The author's bibliography provides insight to background and credibility to the subject. Design: The home page picture welcomes you to an unknown adventure. The resources are set in a methodical approach of one related topic to another. The added searches are easily accessibl;e and seem to have updated information. The sponsor advertisements do not overwhelm the site.

Ryan Magrum Sept 15th, 2011 Overview: The purpose of this site is to provide information and updates in science in the form of news articles to the general educated public. There are links to scientific news magazines as well as links to other scientific web sites. My overall impression of this site is that it is easy to read and navigate and there is a plethora of knowledge available within the contents. It's great for students studying specific topics in science to read. Content: PhysOrg, at first glance, is not flashy and aimed at consumers. The main goal of the site is general knowledge and entertainment in the form of scientific reading. The articles, with topics ranging from nano-science to medicine, are written with very few technical terms making the content easy to comprehend by the average educated individual including high school students with background instruction in the topic of interest. The articles are news updates on the emergence of new things in science sometimes with a brief explanation of the mechanism behind the new discovery complete with figures. Such articles would be a great starting point for a research paper. The articles also include hyperlinked citations to the primary sources. There are many links to other scientific news sites. Design: This site is not aimed at attracting a passerby web surfer. The target audience is attracted to the content within and already has a general idea of what they want to get out of PhysOrg. Therefore, the site is made easy to navigate and less flashy with few advertisements and the ads on the site are related to the scientific topics and links on the site. For example: an ad for paper that is really white for printing off the articles to read as a hard copy while making the articles easier to read. The links to the articles are strait forward not to bias clicking on any specific article if in the "spotlight stories" area. All the articles are arranged for the navigator to find specific arti

The purpose of this game is to get a ball into a bucket by arranging various gears and other objects. It deals with basic principles of motion and physics.