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True / False. What is sound?
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Are these sentences true or false? Sound is produced by vibrating objects. We perceive sound because we use our sense of hearing. Sound cannot travel through water or solids. If there is no material…
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Comprehension Check (II)
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- 1554 visitas
Correct the false ones. Red and white are the colors of the Canadian flag. There is a big white maple leaf on the Canadian flag. About 128 maple trees grow in Canada. A maple tree can be 45 meters tall.…
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Reflect. Bacteria 3.1
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Read the text about saprophyte bacteria and do the activity: Saprophytes: They live on decomposing organic material and transform it into inorganic material (mineral salts). Plants use this inorganic…
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Understanding the text (IV)
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- 1531 visitas
Let’s describe the four ghosts in the story! Complete the ‘looked’ and ‘was’ columns with suitable adjectives. Then complete the ‘had’ column, like the example. silent young happy tall…
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Learn... Distances in the Universe
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The Universe is vast. For this reason, special units are needed to measure these tremendous distances. Astronomers basically use two types of units: the astronomical unit and the light year. The…
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Unit 11: The Animal Kingdom (I). Invertebrates
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Ambulacral system (n): the system of tubes which echinoderms use to move about. annelid (n): an aquatic or land worm with a segmented body. antennae (n): paired receptors on the head of many arthropods…
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Writing a summary
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- 1485 visitas
Look at the pictures below. They tell the story of Parts One to Five of The Canterville Ghost. Use the pictures to help you write a summary of the story. You can begin: Mr Otis bought Canterville Chase…
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Self-assessment T12 08 - Light and sound
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Complete these sentences with the correct words: Sound is produced when objects . We perceive sound because we use our sense of . If there is no material nearby, sound does not travel. An happens when…
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Investigate. Optical instruments
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These days, scientists use many optical instruments that send us images from space and give us information about the Universe. Find out the names of some of these instruments, where they are kept and…
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Grammar 01
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Complete the sentences with the correct preposition from the box. into from for on without of in We cannot live natural resources. Natural resources are the most important thing our planet. When we use…
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