What is atmospheric pressure?

The weight of air pressing down

Atmospheric Pressure Quiz With Answers: Test Your Knowledge

This atmospheric pressure quiz covers what air pressure is, Torricelli's barometer, units like millibars and hectopascals, high and low pressure systems, isobars, altitude effects and record pressures. Test your knowledge with 10 questions about the weight of the air.

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

Question 1 / 10 Time: 150s

Definition
What is atmospheric pressure?
Sea level
What is average sea-level pressure?
Torricelli
Who invented the mercury barometer?
High
What weather usually comes with high pressure?
Low
What weather usually comes with low pressure?
Isobars
What are isobars on weather maps?
Altitude
How does air pressure change with height?
Pascal
Who showed that pressure drops on a mountain in 1648?
Record high
Where was the highest sea-level pressure recorded?
Record low
Which storm type produces the lowest pressures?

Explanations: answer key for all 10 questions

Q1: What is atmospheric pressure?
Answer: The weight of air pressing down
It acts in all directions.
Q2: What is average sea-level pressure?
Answer: About 1013 hectopascals
It is also 1013 millibars.
Q3: Who invented the mercury barometer?
Answer: Evangelista Torricelli
He did it in 1643.
Q4: What weather usually comes with high pressure?
Answer: Clear, calm weather
Sinking air prevents clouds.
Q5: What weather usually comes with low pressure?
Answer: Clouds, rain and wind
Rising air forms clouds.
Q6: What are isobars on weather maps?
Answer: Lines of equal pressure
Close isobars mean strong winds.
Q7: How does air pressure change with height?
Answer: It decreases
There is less air above you.
Q8: Who showed that pressure drops on a mountain in 1648?
Answer: Blaise Pascal
His brother-in-law carried a barometer up Puy de Dôme.
Q9: Where was the highest sea-level pressure recorded?
Answer: Mongolia
It reached about 1084 hPa in 2001.
Q10: Which storm type produces the lowest pressures?
Answer: Typhoons and hurricanes
Typhoon Tip reached 870 hPa.

Atmospheric Pressure Quiz – The Weight of the Air

Atmospheric pressure is the force of air pressing on Earth's surface. At sea level, it averages about 1013 hectopascals, equal to about one kilogram pressing on every square centimeter, though we do not feel it because it pushes from all directions.

Pressure changes with weather and altitude. High pressure brings sinking air and usually clear skies, while low pressure brings rising air, clouds and storms. Weather maps show pressure with lines called isobars.

Evangelista Torricelli invented the barometer in 1643, and Blaise Pascal proved pressure drops with height. Today barometers help forecasters track storms, and pilots and climbers must account for thin air at altitude.

What This Quiz Teaches

This quiz is for students learning about atmospheric pressure.

What air pressure is
What normal pressure is
How highs and lows differ
What isobars show
How altitude affects pressure

Did You Know?

Ears pop when pressure changes quickly.
Water boils at lower temperatures on mountains.
Aneroid barometers have no liquid.
Pressure units honor Pascal.
Cabin pressure is kept higher on planes.