Hot Air Balloons

What is the purpose of the parachute valve?

• It allows air to move freely in the balloon.
• It opens and closes to allow the balloon to descend and asend. 
• It helps the balloon by storing fuel.
• It is an escape route in case of fire. 

Hot air is ________dense than the air around it, that is how the balloon can rise. 

• more
• less

Why did the balloon come back down to the ground?

• The air around it pushed it down.
• The air inside cooled and became more dense forcing the balloon to descend. 
• The air inside the balloon heated up and the air was too hot to rise. 
• The balloon may have had a hole in it.

The hot air balloon is first filled with cold air before being heated up. 

• true
• false

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

What part is A?

• balloon envelope
• balloon span
• basket
• outside of balloon (no...not right answer)

What part is B?

• gores
• balloon envelope
• burner
• seat cushion

Which part carries the passengers?

• A
• B
• C
• D

How is a balloon steered? 

• The pilot cannot steer a balloon.
• There is a steering wheel that the pilot uses.
• The pilot descends and climbs to different air levels and rides the wind. 
• There is a mechanism inside the balloon that allows it to be moved horizontally

Wind speed increases as you get ________ in the atmosphere.

• higher
• lower

Tags

NGSS.MS-ESS2-6

What are the two methods in which a balloon can descend? 

• Let the air cool or pop a small hole in the balloon.
• Add additional weight to the basket or let the air cool.
• Let the air cool or release the air through a deflation valve.
• Let the air cool or jump up and down.