Air masses can change temperature and moisture as they move. When two air masses meet they form a boundary called a front. Fronts are usually [blank] or cold.

Question

Air masses can change temperature  and moisture as they move.  When two air masses meet they form a boundary called a front.  Fronts are usually [blank] or cold.

warm

snow

energy

GPT-4o mini · Answer

Fronts are usually **warm** or cold.