Question

What is a stationary front?

1.when a cold air mass remains in place
2.when a cold air mass and a warm air mass meet and don't move
3.when two cold air masses meet and don't move
4.when a warm air mass doesn't move

Answer 1

A stationary front is a weather front or transition zone between two air masses, when neither air mass is advancing into the other at a speed exceeding 5 knots at the ground surface.