🔍 Key Concepts

• Air masses and how they interact • Difference between a cold front and a warm front • What happens when one air mass displaces another

💭 Think About

• Ask yourself: which type of front occurs when a mass of colder, denser air pushes under and forces warmer air to rise? • Think about which type of front is usually associated with sharper temperature changes and more sudden weather changes. • Consider the definition of each choice: which front is actually moving so that one air mass replaces another, and which ones involve little or no movement or a combination of fronts?

✅ Before You Answer

• Verify the definition of a front as the boundary between two air masses of different temperatures and densities. • Check which type of front is specifically defined as colder air actively moving into an area occupied by warmer air. • Eliminate any front types that involve little movement or a mix of warm and cold fronts together rather than simple displacement.