Question

When a cP air mass travels from northern Canada across the Great Lakes in early Autumn, it becomes __________.

a. warmer and more humid
b. colder and more humid
c. colder and less humid
d. warmer and less humid

Answer 1

A cP air mass from northern Canada becomes warmer and more humid as it travels over the Great Lakes in early Autumn due to the uptake of warmth and moisture from the lakes.

Step-by-step explanation:

When a cP air mass (continental polar air mass) travels from northern Canada across the Great Lakes in early Autumn, it becomes warmer and more humid. This transformation occurs as the air mass, which is initially very cold and dry, moves over the relatively warmer waters of the Great Lakes.

The warmth of the lakes leads to an increase in the temperature of the air mass and also adds moisture, as water evaporates from the lake surface into the air.