What is the primary reason blimps are rarely seen today except at sports events?

• They are too expensive to operate.

• They can only fly short distances.

• Airplanes replaced them as preferred transport.

• They are not safe.

What type of gas is primarily used in modern blimps for lift?

• Oxygen

• Hydrogen

• Nitrogen

• Helium

What is the function of ballonets in a blimp?

• To control the blimp's direction

• To adjust the blimp's altitude

• To enhance the speed

• To power the engines

Which gas was originally used in airships before being replaced due to safety concerns?

• Helium

• Hydrogen

• Carbon dioxide

• Methane

What is the main advantage of blimps over helicopters at sporting events?

• Longer flight time at lower cost

• Higher altitude capability

• Faster speed

• Lower noise production

How do blimps generally steer while in the air?

• Using sails

• Using solar panels

• Using jet engines

• Using rudders and propellers

Who were the inventors of the first hot air balloon?

• Count Ferdinand von Zeppelin

• Henry Gifford

• Jaques Etienne and Joseph Mitchell Montgolfier

• The Wright brothers

What was a major historical event that affected the popularity of airships?

• The Hindenburg disaster

• The invention of the helicopter

• The Wright brothers' first flight

• The first flight of a jet airplane