What is a lapse in atmospheric conditions?

What is a lapse in atmospheric conditions?

• A. When atmospheric temperatures are constantly decreasing as height increases
• B. When atmospheric temperatures are constantly increasing as height increases
• C. When humidity decreases with height
• D. When atmospheric pressure increases with height

Answer: (A)

The concept being tested is how temperature changes with height, known as the lapse rate. In the lower atmosphere, air generally cools as you rise, so the temperature decreases with altitude. That downward trend is what a lapse in atmospheric conditions describes. While the exact rate varies, a typical environmental lapse rate is about 6.5°C per kilometer, meaning higher elevations are cooler than the surface. The other statements describe different atmospheric properties: warming with height occurs in the stratosphere due to ozone absorption, humidity changes with height, and pressure actually decreases with height, not increases.

The concept being tested is how temperature changes with height, known as the lapse rate. In the lower atmosphere, air generally cools as you rise, so the temperature decreases with altitude. That downward trend is what a lapse in atmospheric conditions describes. While the exact rate varies, a typical environmental lapse rate is about 6.5°C per kilometer, meaning higher elevations are cooler than the surface. The other statements describe different atmospheric properties: warming with height occurs in the stratosphere due to ozone absorption, humidity changes with height, and pressure actually decreases with height, not increases.