Question

an illustration of how a convection current creates a wind, called a land breeze, is provided. which of the following best explains what creates this convection current? the rotation of earth makes the air above it rotate, but not the same over land and water. during the evening, the land cools off more quickly than the water, so the air is different temperatures. because of its mass, earth’s gravity creates a high pressure area over both the land and water. salt in the ocean makes it more dense than the land, so its gravity pulls more on the air above it.

Explanation:

A land breeze is a convection current caused by temperature differences between land and water. At night, land (with lower specific heat) cools faster than water. Cooler, denser air over land sinks, creating high pressure, while warmer air over water rises, creating low pressure. Air moves from land (high pressure) to water (low pressure), forming the land breeze.

• Option 1: Earth’s rotation affects wind via Coriolis effect, not land - breeze formation. Eliminate.
• Option 2: Correctly explains that evening land cooling (faster than water) creates temperature - driven air - movement (convection current) for land breeze.
• Option 3: Gravity doesn’t create pressure differences for land breeze; temperature differences do. Eliminate.
• Option 4: Ocean density (from salt) doesn’t drive land - breeze convection; temperature differences do. Eliminate.

Answer:

B. During the evening, the land cools off more quickly than the water, so the air is different temperatures.