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רמה: מתקדמים

Nanotechnology

מאמר באנגלית לתרגול קריאה. כולל 5 מילים חדשות עם תרגום לעברית, 3 שאלות הבנת הנקרא, 5 שאלות לשיחה. מתאים למתקדמים.

Read the article below.

Anyone unfamiliar with nanotechnology should start with geckos. These lizards are among the finest climbers in the entire animal kingdom. You notice that spiderman should have been named gecko man as you watch them move along a horizontal piece of glass upside down. These guys can climb higher than spiders at any time.

Each toe possesses over two million microscopic hairs on its underside, which may be seen under a microscope. Each of these hairs is shown to break into hundreds of even smaller nano-hairs, or "spatulae," under the higher magnification of an electron microscope. For more than 15 years, scientists have been trying to figure out what makes gecko toes so sticky and how to create nano hairs with the same structure.

The area of research presently referred to as nanotechnology includes projects like this one. The technologies being developed in this area can be measured in a few nanometers. Richard Feynman was largely responsible for igniting interest in this level of technology development at the beginning of the 1960s, but Dr. Eric Drexler, who spurred scientists through a series of speeches and a book titled "Engines of Creation: The Coming Era of Nanotechnology," coined the term "nano" in the 1990s.

מילים חדשות מהטקסט

  • Nanotechnology /nænəʊtɛkˈnɒləʤi/ noun ננוטכנולוגיה

    the science of working with atoms and molecules to build devices (such as robots) that are extremely small

    Nanotechnology will give us metals that don't bend, or bend and yet remember their original shape.

  • Microscopic /ˌmaɪkrəsˈkɒpɪk/ adjective מִיקרוֹסקוֹפִּי

    extremely small

    There is a microscopic crack in the diamond.

  • Magnification /ˌmægnɪfɪˈkeɪʃən/ noun הַגדָלָה

    the larger appearance of an object when it is seen through a microscope, telescope

    We used a microscope to examine the cells under magnification.

  • Nanometers /ˈnænoʊˌmitərz/ noun ננומטרים

    one billionth of a meter

    A decade ago the industry was preening itself after developing 250-nanometer technology.

  • Spurred /spɜːd/ verb דורבן

    promoted the development of; stimulated.

    Daniela said this was what spurred their fighting.

שאלות לשיחה

אין כאן תשובה נכונה — אלה שאלות לתרגול דיבור, לבד או מול מורה.

  1. What comes into your mind when you hear the word nanotechnology?
  2. How do you think scientists can work with and make things that are a billionth of a meter wide?
  3. Why do you think people are interested in nanotechnology?
  4. How might nanotechnology help medicine?
  5. How excited are you about the future?

בדקו את עצמכם

3 שאלות. בחרו תשובה וקבלו בדיקה מיד.

  1. For how many years have scientists been trying to figure out how to create nano hairs with the same structure?

  2. Under what tool can you see each gecko’s toe that has around two million tiny hairs?

  3. Who coined the term “nano”?

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