WorksheetsESL Hot Air Balloon Vocabulary
Total questions: 11
Worksheet time: 5mins
The bottom part of the balloon that carries passengers is called the ______.
bowl
mixer
basket
luggage
The _____ controls the passage of fluid or AIR in a device.
valve
balloon
fire
passenger
Which gas is most commonly used to heat the air inside a hot air balloon?
Oxygen
Hydrogen
Propane
Nitrogen
What is the main reason hot air rises in a hot air balloon?
Hot air is more magnetic
Hot air is less dense than cooler air
Hot air is wetter than cool air
Hot air is heavier than cool air
What is the purpose of the envelope in a hot air balloon?
To keep the balloon anchored to the ground
To store fuel
To contain the hot air
To navigate the balloon
Which of the following is a property of gases?
they are easy to compress
they do not expand to fill their containers
they occupy far less space than the liquids or solids
none of the answers apply
Why do weather balloons expand as they ascend into the atmosphere?
The rubber material heats up and expands in sunlight.
They encounter more air resistance at higher altitudes.
The atmospheric pressure decreases with altitude, allowing the gas inside to expand.
They are designed to expand to cover a larger area for better data collection.
Why is helium preferred over hydrogen in filling weather balloons, despite hydrogen being lighter and providing more lift?
Helium is cheaper than hydrogen.
Helium does not react with the balloon material.
Helium is not flammable, making it safer to use.
Hydrogen is not available in sufficient quantities.
How can a pilot control the altitude of a hot air balloon?
By changing the direction of the wind
By adjusting the amount of hot air in the envelope
By flapping the envelope
By adding more weight to the basket
What part of the hot air balloon is responsible for heating the air?
The envelope
The basket
The burner
The vents
What happens to the air inside the balloon when the air is heated by the burner?
It becomes more dense
It condenses
It moves around more
It freezes
