Air Pressure and Altitude Concepts

The video explains how air pressure is used to measure altitude, highlighting the role of sensors in smartphones and tablets. It demonstrates an experiment using an app to measure air pressure changes in an elevator. The video also discusses how airplanes use air pressure models to determine altitude, considering atmospheric conditions and geographical features.

What do airplanes use to measure their altitude?

• GPS

• Speedometers

• Air pressure

• Temperature sensors

What is one of the sensors found in smartphones and tablets?

• Thermometer

• Barometer

• Altimeter

• Anemometer

What does the Five Hawks app allow you to do?

• Make phone calls

• Play games

• Send messages

• Read sensor values

What unit is used to measure air pressure in the app?

• Pascals

• Millibars

• Inches of mercury

• Atmospheres

What happens to air pressure as you move up in an elevator?

• It remains constant

• It decreases

• It increases

• It fluctuates randomly

How much did the air pressure drop when moving to the third floor?

• 2.0 millibars

• 3.0 millibars

• 1.2 millibars

• 0.5 millibars

Why can't air pressure changes be extrapolated to very high altitudes?

• Due to atmospheric conditions

• Due to humidity levels

• Because of temperature variations

• Because of wind speed

What range can air pressure vary between at ground level?

• 800 to 900 millibars

• 950 to 1030 millibars

• 1050 to 1150 millibars

• 1000 to 1100 millibars

What must airplanes consider besides air pressure for accurate altitude measurement?

• Temperature

• Earth's curvature

• Wind direction

• Mountainous terrain

Why is it important to get the air pressure right for airplanes?

• To reduce noise

• To ensure safety

• To increase speed

• To save fuel