What is a jet stream?

A fast, narrow band of wind high in the atmosphere

What creates jet streams?

Temperature differences and Earth's rotation

How did Japan use the jet stream in World War II?

Sending balloon bombs to North America

The Jet Streams Quiz – Facts Worth Knowing

Take the jet streams quiz to explore polar and subtropical jet streams, how fast they blow, how they steer storms, Rossby waves, their effect on flight times, their discovery by pilots and how a wavier jet stream may bring extreme weather. Ten questions with facts worth knowing.

Start the Jet Streams Quiz

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

Question 1 / 10 Time: 150s

Definition
What is a jet stream?
Height
About how high are jet streams?
Speed
How fast can jet stream winds blow?
Types
Which two main jet streams affect each hemisphere?
Cause
What creates jet streams?
Flights
Why are eastbound transatlantic flights often faster?
Japan
Who first measured the jet stream in the 1920s?
War
How did Japan use the jet stream in World War II?
Waves
What are the large meanders of the jet stream called?
Extreme
What can happen when the jet stream gets stuck in a wavy pattern?

Explanations: answer key for all 10 questions

Q1: What is a jet stream?
Answer: A fast, narrow band of wind high in the atmosphere
Jet streams flow mostly west to east.
Q2: About how high are jet streams?
Answer: About 9 to 16 kilometers
Near the top of the troposphere.
Q3: How fast can jet stream winds blow?
Answer: Over 300 km/h
Speeds vary with season.
Q4: Which two main jet streams affect each hemisphere?
Answer: Polar and subtropical
The polar jet is usually stronger.
Q5: What creates jet streams?
Answer: Temperature differences and Earth's rotation
Strong contrasts make faster jets.
Q6: Why are eastbound transatlantic flights often faster?
Answer: They ride the jet stream
Some flights arrive over an hour early.
Q7: Who first measured the jet stream in the 1920s?
Answer: Wasaburo Oishi
He used weather balloons in Japan.
Q8: How did Japan use the jet stream in World War II?
Answer: Sending balloon bombs to North America
Some reached the US.
Q9: What are the large meanders of the jet stream called?
Answer: Rossby waves
They steer weather systems.
Q10: What can happen when the jet stream gets stuck in a wavy pattern?
Answer: Long heat waves or cold spells
Blocking patterns stall weather.

The Jet Streams Quiz – Rivers of Wind

Jet streams are fast, narrow currents of air flowing high in the atmosphere, near where airliners cruise. They form where cold and warm air meet, helped by Earth's rotation, and usually blow from west to east.

Each hemisphere has a polar jet stream and a subtropical jet stream. They steer storms and weather systems, and their position helps decide whether a region gets rain, heat or cold.

Pilots use jet streams to save fuel and time. Scientists study whether a warming Arctic is making the jet stream wavier, which could bring longer heat waves, cold snaps and floods.

What This Quiz Teaches

This quiz is for students learning about jet streams.

What jet streams are
How high and fast they are
What creates them
Why flights are faster east
What Rossby waves are

Did You Know?

A 2020 flight crossed the Atlantic in under 5 hours.
Jet streams shift with the seasons.
Weather forecasts track jet streams closely.
Clear-air turbulence often occurs near jets.
Other planets have jet streams too.