Introduction to: Introduction to: Hot Air Balloon TravelHot Air Balloon Travel

What is a Balloon?What is a Balloon?Balloon…

◦A spherical craft made of silk, rubber, or other suitable nonporous materials that contain either hot air or a gas that is lighter than air.

Key Characteristics of a Key Characteristics of a BalloonBalloon

1. The gas or fluid that fills the balloon must be lighter than air. (hot air, steam, helium, hydrogen).

2. The envelope or container must be:a. Light weightb. Airtightc. Securely Fastenedd. Strong enough to support a man.

3. The ability to produce gas in sufficient quantities must exist.

Basic Parts of a BalloonBasic Parts of a Balloon

Basic Parts of a BalloonBasic Parts of a Balloon

Basic Parts of a BalloonBasic Parts of a Balloon

The Science of Balloon The Science of Balloon TravelTravel

Pressure

Pressure

Pressure

Pressure

Buoyancy

Gravity

The Science of Balloon The Science of Balloon TravelTravel

Pressure

Pressure

Pressure

Pressure

Buoyancy

Gravity

The Science of Balloon The Science of Balloon TravelTravel

Pressure

Pressure

Pressure

Pressure

Buoyancy

Gravity

What is Density?What is Density?…how closely molecules are packed

together.

… a more dense fluid or object.

1.Object or fluid weighs more…2.Molecules move slower…3.Example: Ice

… a less dense fluid or object.

1.Object or fluid weighs less…2.Molecules move faster…3.Example: Steam

What is Buoyancy?What is Buoyancy?…an upward force created by a difference in

density between a fluid and an object.

What is a fluid? – A substance that conforms to the shape of its container. (Examples: Water & Gases)

What is Buoyancy?What is Buoyancy?Relative to how Hot Air Balloons Operate.You can make air less dense by heating it!

What is Buoyancy?What is Buoyancy?Relative to how Hot Air Balloons Operate.