Understanding Air Composition

The video explores the composition of air, debunking the common belief that it is mostly oxygen. It reveals that oxygen constitutes about 21% of the air, while nitrogen makes up 78%. The remaining 1% consists of trace gases and particles. The video also explains how oxygen levels vary with location, such as higher near oceans and lower at high altitudes. It highlights the role of oceans and plankton in oxygen production and discusses the presence of water vapor, dust, and other particles in the air.

What is a common misconception about the air we breathe?

• It is mostly made of nitrogen.

• It is mostly made of oxygen.

• It contains no water vapor.

• It is entirely composed of trace gases.

What percentage of the air is made up of oxygen?

• 1%

• 21%

• 50%

• 78%

Which gas makes up the majority of the air we breathe?

• Carbon Dioxide

• Helium

• Oxygen

• Nitrogen

How do oxygen levels change as you move closer to the ocean?

• They disappear completely.

• They increase.

• They decrease.

• They remain the same.

What is the oxygen level at the peak of Mount Everest compared to average levels?

• Twice the average

• Half the average

• Equal to the average

• One-third of the average

What is the primary source of oxygen on Earth?

• Mountains

• Deserts

• Oceans

• Forests

What role does nitrogen play in the air we breathe?

• It is a trace gas.

• It is mostly inert and exhaled unchanged.

• It is converted into oxygen.

• It is essential for breathing.

Which of the following is NOT a trace gas found in the air?

• Argon

• Methane

• Oxygen

• Neon

What factor affects the amount of water vapor in the air?

• Wind speed

• Air pressure

• Temperature

• Altitude

What can be found in the final 1% of the air besides trace gases?

• Only gases

• Dust and pollen

• Pure oxygen

• Only water vapor