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. 

The Breitling Orbiter was the first balloon to

• carry a US president.
• have a shiny red body.
• be in a museum for aviation. 
• travel around the world nonstop.

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

• more
• less

Tags

NGSS.MS-PS1-4

The first hot air balloons in the 1780's carried ________.

• barnyard animals
• people
• robots
• space aliens

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.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS2-2

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

• true
• false

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The word ambient means? 

• dense
• light; airy
• surround; encircling
• fluid

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