[This is the stem.]

(2 points)
A , is when a warm air masses advances on a cold air mass and are expected to follow.

cold front

what is the second blank

thunderstorms

are those the correct answers

Yes, those are the correct answers. A cold front occurs when a warm air mass advances on a cold air mass, and thunderstorms are expected to follow.

Based on the given stem, it seems that a term is missing before "is when a warm air masses advances on a cold air mass." Please provide the complete sentence or rephrase your question.

To find the answer to this question, we need to understand the different types of air masses and their interactions.

First, let's define the terms mentioned in the question:
- Warm air mass: A large body of air with warm temperatures, usually originating from lower latitudes.
- Cold air mass: A large body of air with cold temperatures, usually originating from higher latitudes.

Now, let's examine the scenario described in the question:
"A _____ is when a warm air mass advances on a cold air mass and _____ are expected to follow."

Based on the given information, we can infer that the missing word in the first blank refers to the weather phenomenon when a warm air mass meets a cold air mass. This phenomenon is called a front.

To complete the second blank, we need to understand the types of fronts that form when a warm air mass advances on a cold air mass. The types of fronts that can form in this situation are cold fronts and warm fronts. Cold fronts occur when a fast-moving cold air mass overtakes a slow-moving warm air mass, resulting in abrupt weather changes and usually bringing thunderstorms. Warm fronts occur when a slow-moving warm air mass overtakes a cold air mass, leading to gradual weather changes and often bringing steady rain or drizzle.

Without more context or information in the question, we cannot determine which type of front or weather conditions are expected to follow in this specific scenario. Therefore, the second blank remains incomplete.

To summarize, the missing word in the first blank is "front," which is a weather phenomenon that occurs when a warm air mass meets a cold air mass. The answer to the second blank cannot be determined without further information.