Question

the map below shows air temperatures in the lower atmosphere on september 12, 2017. the outlined areas show two air masses that influenced weather in australia on that day. look at the map. then, answer the question below. data source: united states national oceanic and atmospheric administration/earth system research laboratory, physical sciences division which air mass was warmer? air mass a air mass b

Explanation:

Step1: Analyze the color - temperature key

The key shows that warmer temperatures are represented by colors towards the red end of the spectrum (higher positive values), and cooler temperatures are represented by colors towards the blue end (negative or lower positive values).

Step2: Compare the colors of air mass A and air mass B

Air mass A is colored in a shade that corresponds to a higher temperature range (looking at the key, it is in the range of positive values, likely around 15 - 30°C). Air mass B is colored in a shade that corresponds to a lower temperature range (negative or near - zero values).

Answer:

air mass A