A warm front forms when

Acold air moves up over warmer air.
Ba warm air mass meets another air mass of the same temperature.
Cwarm air glides up over colder air.
Dthe temperature in a warm air mass increases. Reset Selection

Mark for Review What's This?

Verified Answer :

A warm front forms when warm air glides up over colder air.

Answer: C. warm air glides up over colder air.  

Warm front is a transition zone between warm air mass and cold air mass. A typical warm front moves from a southwest to northeast direction. The air behind the warm front is warmer and moist whereas the air in front is cooler. A warm front bring change to the atmosphere of a region. It makes the atmosphere warmer and humid.

Warm air glides up over colder air results in a formation of warm front as colder air is replaced by warm air.