B12

Before the invention of the hot air balloon, no human had ever successfully flown above the ground.

INVENT

B13

Two French brothers, Josef and Etienne Montgolfier, were responsible for designing the world's first hot air balloon.

FRANCE

B14

The first successful flight was in 1783, and the Montgolfier

FLY

B15

brothers immediately became famous throughout the world.

FAME

B16

The design of hot air balloons is based on the scientific law that hot air rises. A burner at the bottom of the balloon

SCIENCE

B17

provides the heat. As the air inside the balloon gets hotter, the balloon takes off.

HOT

B18

Its height above the ground is determined by how hot the air inside is and its direction of travel depends on the wind.

DIRECT