Puzzle 4

A blue green semi-precious opaque stone.

Ability to smell through receptors in the nose.

Citizens of Giza and Cairo.

Fish use gills for this process.

Greek philosopher and Plato's student successor.

Maurice __, French cabaret singer and movie star.

Noise heard when breaking the sound barrier.

Perfume or cologne.

Social media platform created by Kevin Systrom.

Stevie Nicks' rock group: __ Mac.

The location of Park Güell and La Sagrada Familia.

They're the superheroes' assistants.

When older people go first: __ beauty.