A mixture of smoke and fog

The direction in which the slope faces in relation to the sun's rays

Forms when nights are cold, clear and cloudless

Forms where conditions of heating and cooling occur regularly in a valley.

Type of wind that results from air sinking down the valley slope at night

Type of wind that results from air moving up the valley slope during the day

Inversion layers happen when air is warmed by the warmer sides of the valley- making the temperature decrease not increase with height.

Radiation fog is when

Frost pockets form where the cold air ____________________ to the valley floor

Fog that forms under frontal conditions

Fog that forms when air moves slowly upwards along a gradual slope and is cooled adiabatically.

Fog that forms when warm air encounters a cold surface as it moves along a horizontal plane

The Region in a valley where there is no direct heating from the sun.

The inversion layer in a valley is where ........