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Spiders World wide webs

Spiders World wide webs. By: Michelle Yun. Webs. Spider Silk. A spider’s silk is made out of chains of amino acids. It is 5 times stronger than steel, and can stretch 30% longer than its original length without breaking.

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Spiders World wide webs

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  1. Spiders World wide webs By: Michelle Yun

  2. Webs Spider Silk A spider’s silk is made out of chains of amino acids. It is 5 times stronger than steel, and can stretch 30% longer than its original length without breaking. If one strand of the web breaks off, which would cause a lot of stress, the rest of the web would remain unharmed.

  3. Looking Closer at the Spider • At the end of the spider’s eight legs are thick brushes of hair, and the end of each hair is covered in microscopic “feet”. • Spiders do not always have 8 eyes. If they do, they are arranged differently. Some spiders have 4 eyes, and even 2! • No matter how big or small the spider is, the brain is always the same size! As a result, the brain spills into the spider’s body cavities! • Spiders have claws that help them walk on walls, ceilings, and their web. • Spiders have fang-like pincers with special poison glands, used to defeat their prey.

  4. How Spiders Make Webs At the back of the spider’s body there are three pairs of glands, each with a tube. This tube is called a spinneret. To create a web, the spider pushes against an object , and forces out some liquid silk. When the spider moves away, sticky liquid is drawn out and hardens in the air. The spider then coats its legs with an oily substance from its mouth, so it won’t get caught on the sticky strands of web. Silk doesn’t always come from the spinneret. Tarantulas can let out silk from their feet to help them climb vertical surfaces because they are bigger and they weigh themselves down.

  5. http://www.infovisual.info/02/052_en.html

  6. = sticky = non-sticky How spiders make their webs (continued) A typical way spiders make webs http://science.howstuffworks.com/zoology/insects-arachnids/spider5.htm

  7. Resources • http://uk.answers.yahoo.com/question/index?qid=20070713110836AAUKoni • http://news.nationalgeographic.com/news/2011/12/111219-spiders-big-brains-bodies-legs-webs-animals-science/ • http://io9.com/5867475/spiders-have-to-keep-their-extra-brains-in-their-legs • http://www.bbc.co.uk/nature/16809642 • http://animals.howstuffworks.com/arachnids/question87.htm • http://www.uksafari.com/spiders3.htm • http://www.planet-science.com/categories/over-11s/natural-world/2012/02/strong-like-spider-silk.aspx

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