• Type in the correct tense of the verb in the spaces.
  • Click the button at the bottom to check your answers.
  • Press the "refresh" button on your browser to play again.

learn help be develop work be look cling be make
develop dip join last be have speak be increase make
Humans have many things from nature. These things have us in our daily life. The latest thing self-repairing clothing. Scientists have a special way for clothing to repair rips and tears by itself, without the need for sewing. It with materials such as cotton, linen and wool. The scientists from the Naval Research Office and Pennsylvania State University in the USA. Scientists Dr. Walter Dressick and Dr Melik Demirel at how squid can on to things so well. The research team found a protein in the rings of teeth that cover the suckers on a squid. The protein similar to the one found in the silk that spiders use to spider webs. It is very strong and elastic (stretchy).

The new protein has been as part of a coating, which is put on clothes. When the coating is in water, the area around the rip or tear together in less than a minute. This could help clothes longer and save us money. It could also useful for military and survival clothes. People like soldiers and mountaineers would be safer if they clothes that repaired quickly and easily. Professor Demirel about the invention. He said: "The coatings are thin, less than a micron, so they wouldn't noticed in everyday wear." He added: "Even thin, they the overall strength of the material. For the first time, we are self-healing textiles."

Back to the self-repairing clothes lesson.

Share this lesson

More Free Sites by Sean Banville

Online Activities