Question 1
The first aeroplane was invented in 1903 by the Wright Brothers. The Wright Flyer was built with a wooden frame and covered with fabric. Modern-day jet engines are usually made from aluminium and titanium alloys, carbon fibre composites and other plastics. This makes them light, strong and durable. Today, aeroplanes and jets fly higher, faster and for longer periods than ever before, with the help of these materials.
What properties do these materials have that make them so useful?
What properties do these materials have that make them so useful?
