Question

a student notices that temperatures in the midwest drop sharply during this pattern. which statement best explains the temperature change? a the california current pushes warm air eastward into the midwest. b the polar jet stream brings cold air from the north into the midwest. c the polar jet stream increases humidity, causing the air to feel warmer. d the gulf stream warms the midwest by carrying heat inland from the ocean.

Explanation:

The polar jet stream is a fast - flowing, narrow air current in the upper atmosphere. When it dips southward, it can bring cold air from the polar regions (north) into the Midwest. The California Current is a cold ocean current along the west coast of the United States and does not push warm air eastward. The polar jet stream does not increase humidity to make air feel warmer. The Gulf Stream is a warm ocean current, but it is not responsible for the sharp temperature drop in the Midwest shown in the context of the polar jet stream.

Answer:

B. The polar jet stream brings cold air from the north into the Midwest.