Deadly silk
They weigh almost nothing, yet they are stronger than steel. In fact, some spider’ weds are among the world’s strongest materials , but they stretch more than elastic.They can also be any shape.spider webs are amazing.
Changing for the conditions
A spider’s silk-making organ’ has hundreds of small openings. Silk comes out of these openings as a liquid , and , as it reaches the air, it become thread-like. these tiny threads combine to form a single, solid thread.
The spider can make different kinds of thread . the threads can be thick or thin, wet or dry , sticky or woolly . Each kind has a different purpose . some webs create an egg case. others provide hiding places . the most common purpose of a spider web, however , is to catch food.
Tricks for catching dinner
There are many ways the spider uses its web to catch prey .for example, some spider spin singer thread . An insect then sits on it without realizing what it is doing , and become stuck . slowly , the spider move toward the insect . suddenly , it covers , it covers its prey in silk.
Argiope spiders use a different kind of trap . they make webs that confuse insects . An insect sees the web and thinks it’s a flower. It then lands on the web . the spider can feel even the smallest movement of the wed, and rusher at the insect before it can get away.
Spider weds are so amazing that engineers have been studying them for years. They went to learn are so strong and flexible. However,for the moment ,spiders are keeping their secrets. Despite their science and technology , humans still haven’t been able to copy natural webs.