08 04 technology u2b

Module 2B A World of Mystery The telescope All telescopes gather radiation from distant objects over a large area and focus on it; so they increase the intensity of the radiation and allow the objects to be magnified There are different telescopes for different purposes The optical telescope gathers visible light radiation There are three basic types of optical telescopes: refractors that use lenses, reflectors that use mirrors and catadioptrics that use a combination of both lenses and mirrors There are also orbiting telescopes that are used to observe the ultraviolet (UV), far infra-red and X-ray portions of the electromagnetic spectrum The Hubble Space Telescope has special instruments sensitive to infra-red rays, UV rays and X-rays for the study of structures and systems too far to be seen clearly from Earth Finally, radio telescopes have helped vast new regions of the universe to become observable on Earth because radio waves penetrate dust and gas that obscure light These are the greatest and most powerful telescopes The Milky Way is one of the millions of galactic systems in the universe It is formed by hundreds of thousands of stars One of them is the Sun The Milky Way got its name from its white colour and its shape On good weather conditions, it can be seen as a faint white appearance on the night sky which looks like spilled milk New Telescope Hubble Space Telescope Old Telescope Activities 1 Look at these pictures, answer and discuss a What did Galileo Galilei look at with his telescope? b What is the origin of the word telescope? c How are objects magnified through a telescope? d Name three basic types of optical telescopes e What kind of telescope is used for distant star systems? f Why are radio telescopes so helpful? English Toolkit - Technology Photocopiable © Ediciones Santillana S.A / Richmond 2011 What did Galileo Galilei see when he looked through his newly invented telescope? He was probably the first man to see the mountains and craters on the surface of the Moon, the satellites of Jupiter and the starry Milky Way The word telescope is derived from the Greek words tele, from afar, and skopos, viewer Even a very basic telescope can clearly show Saturn’s rings, Jupiter’s bands and red spot, and more Module 2B 2 True (T) or false (F)? a Galileo was the first to see the Moon with his microscope b You can even watch Jupiter’s red spot with a simple telescope c Intensity is increased in telescopes so that objects can disappear d Lenses and mirrors are used in one type of optical telescopes e Refractors and reflectors gather light radiation that is visible f Electromagnetic spectrum portions can be seen by using a magnetoscope g The Hubble Space Telescope has special devices sensitive to different types of rays to study our planet h Radio telescopes help human beings to study the vastness of the universe a magnification b gather c sensitive d vast e allow something extremely large; it covers a great area a bigger than real vision of something 3 perceptive and precise authorise; permit collect 4 Complete the sentences with one word from the previous activity a We travelled south crossing the Patagonian provinces b The Hubble got an incredible of planet Mars c The lens of the microscope is very It perceives the tiniest particles d Microscopes scientists to study bacteria e Telescopes magnify objects because they the radiation from objects and focus on it 5 Apart from Galileo Galilei’s telescope, there were many other inventions during the 17th century Work in groups and choose one of the following inventions and write about them Consider these questions when writing the information Who was the inventor? When did he invent it? Where? What was the invention like? How did it work? Why was it useful? Why was it a great contribution? Inventions: a automatic calculator b pendulum clock c steam engine English Toolkit - Technology Photocopiable © Ediciones Santillana S.A / Richmond 2011 3 Match words and meanings