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Unit 4.5 Cars
Page 233


13. Complete the map with the correct words.

INNOVATIVE ENGINES

Hydrogen cars:
• electricity from 1. reaction between hydrogen and 2. → fuel cell with anode, 3. , and electrolyte

Rotary engine:
• internal combustion engine → triangular 4. spins inside oval-like 5.
• compact, 6. , and smooth
• fewer moving parts → fewer mechanical losses and 7.

Solar cars:
• solar energy from solar 8. on surfaces → sunlight into 9. → drives electric motor directly or charges 10.
• lightweight, energy-efficient, zero 11.
• mainly used in races and 12. projects
14.1 Select the correct innovative engine for this feature: uses a triangular rotor instead of pistons.
14.2 Select the correct innovative engine for this feature: produces electricity through a chemical reaction between hydrogen and oxygen.
14.3 Select the correct innovative engine for this feature: collects energy from sunlight using solar panels.
14.4 Select the correct innovative engine for this feature: compact, lightweight, and smooth design.
14.5 Select the correct innovative engine for this feature: zero emissions while driving.
14.6 Select the correct innovative engine for this feature: fewer moving parts than conventional engines.
14.7 Select the correct innovative engine for this feature: electricity is produced continuously as long as fuel is supplied.
14.8 Select the correct innovative engine for this feature: mainly used in races and experimental projects.
14.9 Select the correct innovative engine for this feature: converts chemical energy into electricity in a fuel cell.
14.10 Select the correct innovative engine for this feature: lightweight and highly energy-efficient.
15.1 Watch the video and decide if the sentences are true (Vero) or false (Falso).
1. Fuel cells were invented in 1839 by William Grove.
2. NASA and the Russian space programme used fuel cells to power spacecrafts.
3. Apple, Verizon, and Coca-Cola use fuel cells to power their cars.
4. Fuel cells produce electricity and heat, with pure water as the only byproduct.
5. Fuel cells store power for a limited amount of time, just like batteries.
6. Fuel cells are noisy and produce harmful exhaust, similar to diesel generators.
7. Fuel cells can be used to provide backup power for mobile phone towers and electrical substations.
8. Other green power solutions are always reliable, even on cloudy or windless days.
15.2 Correct the false sentences from the previous exercise. aperta