Labels:text | screenshot | font OCR: The web of a spider is not only a thing of beauty, but it also practical. It serves as the spider's home and as a trap to catch its food. The silk of a spider's web has amazing strength. Although the silk sometimes has a diameter of only 1/1,000 of an inch, at that diameter, it is stronger than steel. The silk of a spider's web also has amazing stretching qualities. It can be stretched by nearly 20% of its length before breaking! There are seven kinds of spider silk; however, most spiders produce only three or four kinds. The different kinds of silk have different uses. To make the frame of the web, spiders produce a heavy, dry silk. To form the trap to catch insects, they create a sticky kind of silk. The silk is produced from a series of organs called spinnerets. Spiders are excellent construction engineers. With their fragile silk threads they can estimate places of stress and strain in a web, make connections, and measure angles. There are 40,000 species of spiders, but not all of them spin webs. Usually, the best web makers are female. There are thousands of types of webs, from simple ones to more complex types.
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