Question

1. which number below represents an occluded front?

1
2
3
4
○ 3
○ 1
○ 2
○ 4

Explanation:

An occluded front in meteorology is represented by a combination of a cold front (triangles) and a warm front (semicircles) symbol, with the symbols alternating and sharing the same line, indicating a front where a cold front has overtaken a warm front. Looking at the options:

• Option 1 (blue triangles) represents a cold front.
• Option 2 (red semicircles) represents a warm front.
• Option 3 has alternating purple triangles and semicircles on the same line, matching the occluded front symbol (a mix of cold - front - like triangles and warm - front - like semicircles, indicating the cold front has caught up to the warm front).
• Option 4 shows a cold front (blue triangles pointing down) and a warm front (red semicircles) but not the occluded front pattern (they are not combined on the same line in the occluded - front - specific alternating way). So the number representing an occluded front is 3.

Answer:

3