The Volcano That Burns Blue

Kuala Jenga, an active volcano in Java, Indonesia, features a highly acidic crater lake. At night, it emits blue flames due to sulfuric gas combustion. The cooled gases form sulfur, which is mined despite the toxic and dangerous conditions. This unique volcano is both a challenging workplace and a remarkable sight.

What is the temperature of the crater lake at the top of Kuala Jenga volcano?

• 70 degrees Fahrenheit

• 90 degrees Fahrenheit

• 100 degrees Fahrenheit

• 80 degrees Fahrenheit

What causes the bright blue flames at Kuala Jenga?

• Chemical reaction with water

• Reflection of the sky

• Combustion of sulfuric gases

• Lava

What color does the sulfur turn after the gases cool?

• Yellow

• Green

• Blue

• Red

What tool do miners use to extract sulfur at Kuala Jenga?

• Shovels

• Steel bars

• Pickaxes

• Drills

Why is sulfur mining at Kuala Jenga considered dangerous?

• Wild animals

• Steep terrain

• Toxic gases

• High temperatures