The video explores the coldest temperatures recorded on Earth, particularly in East Antarctica, where temperatures can drop below -90 degrees Celsius. It explains the conditions necessary for such extreme cold, including clear skies, still air, and low humidity. The role of water vapor and infrared radiation in heat retention is discussed, as well as the impact of carbon dioxide in trapping heat. The video concludes that -98 degrees Celsius is likely the coldest temperature possible on Earth due to atmospheric conditions.

What was the significance of the discovery of cold pockets in East Antarctica?

• They help us understand the conditions for extreme cold.

• They are the warmest places on Earth.

• They are the highest points on Earth.

• They are the most humid places on Earth.

Which condition is NOT necessary for achieving record-breaking low temperatures?

• Low water vapor

• Still air

• High humidity

• Clear skies

How does water vapor affect the escape of heat from Earth's surface?

• It accelerates the escape of heat.

• It has no effect on heat escape.

• It cools the surface by absorbing heat.

• It absorbs heat and sends it back to the ground.

What is the approximate temperature threshold that scientists believe is the coldest possible on Earth's surface?

• -98 degrees Celsius

• -94 degrees Celsius

• -100 degrees Celsius

• -89 degrees Celsius

Why can't temperatures drop significantly below -98 degrees Celsius on Earth?

• The sun's rays warm the surface.

• The ocean currents regulate temperature.

• Carbon dioxide traps heat, preventing further drops.

• The Earth's core heats the surface.