Deepest Hole in the Earth

The video discusses the world's deepest hole, 12 kilometers deep, where a fall would take nearly a minute. Soviet scientists initiated the project in 1970 to study Earth's crust. They discovered that the crust in that region is primarily granite, not layers of granite and basalt as previously thought. Surprisingly, they also found water squeezed from the rock, indicating the crust contains water. The video highlights the scientific insights gained from this project.

How deep is the deepest hole in the world?

• 5 kilometers

• 15 kilometers

• 8 kilometers

• 12 kilometers

What was the main reason for digging the deepest hole?

• To test new drilling technology

• To create a tourist attraction

• To study the Earth's crust

• To find precious metals

In what year did the Soviet scientists start the project?

• 1960

• 1990

• 1970

• 1980

What was discovered about the Earth's crust at the depth of the hole?

• It is made of layers of granite and basalt

• It is composed of granite transformed by pressure

• It contains large deposits of oil

• It is mostly made of sand

What unexpected element was found in the Earth's crust during the project?

• Gold

• Coal

• Water

• Natural gas