Unit One Matching the Headings Exercise 1 A Giant Step for Artificial Enzymes Exercise 2 More Than Sympathy Exercise 3 Energy from Biological Sources Exercise 4 Sleeping Secrets Exercise 5 It Never Rains Exercise 6 Farmers Harvest the Wind Exercise 7 Germs and Sickness in a Shrinking World Exercise 8 On the Wing Unit Two Cloze Exercise 1 Standards of Measurement Exercise 2 The Function of Carbon Dioxide in the Atmosphere Exercise 3 The Properties of Systems in the Human Body Exercise 4 Analysis and Synthesis Exercise 5 The Properties of Elements, Compounds and Mixtures Exercise 6 The Structure of the Earth Exercise 7 The Carbon Cycle Exercise 8 Vitamins Exercise 9 Thermostats Exercise 10 Pressure Exercise 11 Space and Distance Exercise 12 The Theory of Emotion Exercise 13 Physical Characteristics Exercise 14 Attitude Functions Exercise 15 Functions of Leadership Unit Three Multiple Choice Exercise 1 Are You a Machine of Many Parts? Exercise 2 Making Allowances for Your Kids'''' Dollar Values Exercise 3 The Lost City of De Mille Emerges from the Desert Sands of California Exercise 4 Separate, but EQ Unit Four Summarizing Exercise 1 Adapting to Road Conditions Exercise 2 Biogas: a Solution to Many Problems Exercise 3 A 19th Century Killer Disease: Tuberculosis Exercise 4 For Each Astronaut, a "Buddy" Exercise 5 Management in Cyberspace Exercise 6 Our Dying Seas Exercise 7 Ethics and Archaeology Unit Five YES/NO/NOT GIVEN Exercise 1 The World of the Flat-footed Fly Exercise 2 Energy, Fission and Fusion Exercise 3 Will Britain Turn Its Back on Wave Power? Exercise 4 Talk to Kids about Drugs? Parents Just Don''''t Do It Exercise 5 A New Learning Tool Exercise 6 111 Winds Exercise 7 Stuffed Exercise 8 Brain Drain Exercise 9 Morphing Winglets Make for Greener Aircraft Exercise 10 Transporter of Delight Unit Six Scanning for Answers Exercise 1Batteries Now Included Exercise 2 A Light Bulb that Lasts …… Unit Seven Integrated Exercises Unit Eight Practice Tests