Israel: boundaries + buffer zone + territories + names

Atmospheric layers and physical features involved in trapping smog and pollution during a thermal inversion in a valley.

Regions of France.

Treble clef with the notes indicated

Palau: coasts + states + names

Parts of an adult butterfly

Malta: local councils + names

Gravity flow

Six common substances arranged along the acidic to alkaline pH spectrum from 0 to 14.