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Check. Test yourself
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Remember what you have studied in this unit and answer the questions: What is the temperature of the matter at the Earth's core? How fast do tectonic plates move? How do two touching plates move in…
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Unit 10: Obtaining and using energy
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Acid rain (n): rain which is acidic due to the presence of pollutants. balanced (adj): distributed evenly. biomass (n): organic matter used as a source of energy. blade (n): the arm which makes a wind…
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Unit 3: The Universe and our Solar System
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Asteroid (n): a small irregular body of rock or metal that orbits around the Sun. asteroid belt (n): the space between Mars and Jupiter where most asteroids are found. Big Bang theory (n): the theory…
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Summaries - Obtaining and using energy
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1. Forms of energy Energy is a property of matter which gives it the ability to produce change in its own physical and chemical properties and in those of other bodies... The main forms. of energy are:…
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Summaries - Waves. Light and sound
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1. Waves An oscillatory or vibratory motion takes place around a central position. It produces the same amount of movement on both sides of this position. A wave is the transmission of an oscillatory or…
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Check. Materials that conduct and insulate heat
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Remember what you have studied in this section and answer the questions: What are the three ways by which heat is propagated? Give one example of each. Does matter move in convection? And in radiation?…
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Forms of energy
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1.1. Energy Energy is a property of matter which gives it the ability to produce change in its own physical and chemical properties and in those of other bodies. 1.2. The main forms of energy The main…
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Fill in the gaps
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Read the text below and choose the correct word for each space. OSCAR WILDE’S SHORT STORIES If you enjoyed The Canterville Ghost, and want to read some stories by Oscar Wilde, perhaps translated into…
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Energy transfer: heat
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1.1. Heat The particles that make up matter store energy: Heat or thermal energy is the energy that is transferred from hot bodies to cold bodies (figure 1). All the particles that make up bodies have…
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The propagation of heat
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Heat transfers from a hot object to a cold object by means of three mechanisms: conduction, convection and radiation. 6.1. Conduction Heat is transmitted through solid substances by conduction (figure…
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