Hot Air Balloons

How does a hot air balloon change altitude (go up or down)?

• By releasing gas or jettisoning ballast overboard

• By dropping off a passenger

• By adding helium

• By adding weight to the basket

Tags

NGSS.MS-PS1-4

NGSS.MS-PS2-2

Who invented the first hot air balloon?

• Jean-Pierre Blanchard

• the Montgolfier Brothers

• the Wright Brothers

• Jimmy Doolittle

What is the purpose of the parachute valve?

• It allows air to move freely in the balloon.

• It helps the balloon by storing fuel.

• It opens and closes to allow the balloon to descend and ascend. 

• It is an escape route in case of fire. 

A hot air balloon rises because it contains_______.

• lift fuel, propane and chilled air

• nitrogen and propane

• H2-7R3

• heated air by propane

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NGSS.MS-PS3-4

Why does the air inside a hot air balloon need to be heated continuously during flight?

• To maintain the balloon's shape.

• To keep the air inside less dense than the outside air.

• To prevent the balloon from spinning.

• To comply with aviation laws.

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NGSS.MS-PS3-4

What is the principle behind hot air balloons rising into the air?

• Boyle's Law

• Charles's Law

• The Law of Conservation of Mass

• The Law of Conservation of Energy

How does Charles's Law explain the need to adjust the amount of hot air in a balloon for it to land?

• Decreasing the temperature of the air inside the balloon decreases its volume, causing the balloon to descend.

• Increasing the temperature of the air inside the balloon increases its volume, causing the balloon to descend.

• Decreasing the temperature of the air inside the balloon increases its density, causing the balloon to ascend.

• Increasing the temperature of the air inside the balloon decreases its density, causing the balloon to ascend.

Tags

NGSS.MS-PS1-4

The purpose of the fire in a hot air balloon is to heat up the air to _______.

• increase the mass

• decrease the density

• decrease the mass

• increase the density

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NGSS.MS-PS1-4

What does the hot air balloon valve do?

• It can make the balloon go higher and faster

• It can allow the balloon to descend by releasing some air

• It is only for decoration

• It is the way to prevent birds from being swallowed by the envelope

What helps pilots steer a hot air balloon?

• The use the wind currents

• They lean from side to side

• They use a steering wheel

• They turn handlebars

Tags

NGSS.MS-ESS2-6