In This Unit Theme This Unit Is About the Evolution of Flight
Unit 5 In This Unit Theme This unit is about the evolution of flight. Content Objectives Students will • examine the world of animal and human flight. • read about the development of the first powered aeroplane. • consider how childhood interests can influence career choices. Language Objectives Students will • talk about the evolution of flying animals and machines. • use phrases to argue, counterargue and concede. • use the past perfect to distinguish the first of two actions in the past. • use the past perfect continuous to describe the first of two actions in the past. • write a classification essay describing two types of animal flight. Vocabulary pages 78–79 adaptation, capability, early, evolve, feature, flap, flight, TO START glide, hollow, limited, soar, weight, wingspan 1. We all know that birds fly. What page 80 allow, powered, skilled, other living things fly? Make a list of as many as you can. support page 83 ascend, descend, force, 2. Why do you think humans have parachute, prove, stable always wanted to fly? Jetmen flying over the city of Dubai, United Arab Emirates page 84 engine, fuel, to land, pilot, 3. Would you like to be able to fly? to take off Why or why not? Vocabulary Strategies Root words 76 (port); Using a dictionary Speaking Strategy Arguing and conceding OWI_3_SE_81089_076-091_U05_CP2.indd 76 6/20/16 11:23 AM Grammar Grammar 1 Use the past perfect to Introduce the Unit distinguish the first of two actions • Build background Say The next unit is about flying. Many of us in the past have flown in an aeroplane, but has anyone ever flown in a glider? Grammar 2 Use the past perfect continuous to describe the first of What’s the difference between an aeroplane and a glider? Explain two actions in the past that, unlike aeroplanes, gliders don’t need engines to fly; they are Reading Reaching for the Sky carried along ‘rivers’ of air, called air currents, in the atmosphere.
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