Q 01/05

Which singer co-wrote David Guetta's dance anthem 'Titanium' and provided the vocals on the hit single?

A) Adele

B) Fergie

C) Sia

D) Kesha

Answer · why

C) Sia

Sia recorded her vocal only as a demo for other artists. Katy Perry, who had turned the song down, advised David Guetta to keep Sia on the track.

Q 02/05

Which Cold War spy plane, able to cruise beyond Mach 3, had a structure that was 85% titanium?

A) U-2 Dragon Lady

B) SR-71 Blackbird

C) MiG-25 Foxbat

D) F-117A Nighthawk

Answer · why

B) SR-71 Blackbird

The SR-71 Blackbird needed titanium because its skin heated well beyond 260 °C at cruising speed. Even factory tools mattered: cadmium-plated ones wer...

Q 03/05

Which Spanish city is home to Frank Gehry's Guggenheim Museum, famous for its shimmering skin of titanium plates?

A) Bilbao

B) Barcelona

C) Valencia

D) Seville

Answer · why

A) Bilbao

Bilbao's museum wears titanium plates arranged like scales. Architect Philip Johnson called it the greatest building of our time.

Q 04/05

Trace amounts of titanium, paired with iron, give which precious gemstone its characteristic blue color?

A) Aquamarine

B) Turquoise

C) Tanzanite

D) Sapphire

Answer · why

D) Sapphire

Sapphire owes its star effect to titanium as well. Fine needles of rutile, a titanium mineral, scatter light into the six-rayed star of a star sapphir...

Q 05/05

Titanium dioxide and zinc oxide are the two mineral active ingredients used in which everyday beach-bag product?

A) Sunscreen

B) Lip balm

C) Insect repellent

D) After-sun gel

Answer · why

A) Sunscreen

Sunscreen sold as 'mineral' uses only these two compounds as active ingredients. They work by reflecting, scattering and absorbing ultraviolet light.