What is a temperature inversion?

A layer where temperature rises with height

Why do valleys get colder at night?

Cold, dense air drains downhill and pools

Why can inversions worsen air pollution?

They trap pollutants near the ground

How can an inversion cause freezing rain?

Snow melts in a warm layer and refreezes near the cold ground

Temperature Inversion Quiz: Cold Valleys and Trapped Air

Normally air gets colder as you climb, but sometimes the pattern flips and traps fog and smog near the ground, and this temperature inversion quiz explains why. Play 10 interactive questions on the normal lapse rate, radiation inversions, cold air pooling, frost hollows, valley fog, seas of clouds, smog episodes, London's 1952 Great Smog, freezing rain and how inversions end.

Start Temperature Inversion Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Normal
What normally happens to air temperature as altitude increases?
Inversion
What is a temperature inversion?
Night
Which conditions often create radiation inversions?
Valleys
Why do valleys get colder at night?
Frost
What is a frost hollow?
Smog
Why can inversions worsen air pollution?
London
Which 1952 event was made worse by an inversion?
Clouds
What do hikers see above an inversion?
Rain
How can an inversion cause freezing rain?
End
What usually breaks up an inversion?

Explanations: answer key for all 10 questions

Q1: What normally happens to air temperature as altitude increases?
Answer: It decreases
About 6.5 degrees Celsius per kilometer on average.
Q2: What is a temperature inversion?
Answer: A layer where temperature rises with height
Warm air sits above cold air.
Q3: Which conditions often create radiation inversions?
Answer: Calm, clear nights
The ground loses heat quickly.
Q4: Why do valleys get colder at night?
Answer: Cold, dense air drains downhill and pools
This is called cold air pooling.
Q5: What is a frost hollow?
Answer: A low spot prone to frost
Gardeners avoid planting there.
Q6: Why can inversions worsen air pollution?
Answer: They trap pollutants near the ground
Air cannot rise and mix.
Q7: Which 1952 event was made worse by an inversion?
Answer: The Great Smog of London
Thousands of people died.
Q8: What do hikers see above an inversion?
Answer: A sea of clouds below them
Fog fills the valleys.
Q9: How can an inversion cause freezing rain?
Answer: Snow melts in a warm layer and refreezes near the cold ground
Roads become glazed.
Q10: What usually breaks up an inversion?
Answer: Wind or strong daytime heating
Mixing restores normal conditions.

Temperature Inversion Quiz – Cold Valleys and Trapped Air

Air usually cools with height, by about 6.5 degrees Celsius per kilometer on average. In a temperature inversion, a layer of warmer air sits above colder air near the ground, reversing the normal pattern.

Radiation inversions form on calm, clear nights as the ground loses heat. Cold, dense air drains into valleys and frost hollows, creating fog. Hikers above the layer may see a sea of clouds below them.

Inversions trap pollutants, worsening smog; the Great Smog of London in 1952 was made deadly by one. A warm layer aloft can also melt snow that then refreezes as freezing rain. Wind or daytime heating usually breaks the inversion.

What This Quiz Teaches

Weather and science fans will enjoy these questions.

What an inversion is
When it forms
Why valleys get cold
How it affects pollution
How it ends

Did You Know?

Salt Lake City often suffers winter inversions.
Sounds can travel farther under inversions.
Pilots watch for inversions near airports.
Farmers use fans to fight frost on inversion nights.
Mirages can form in strong inversions.