Aire-1

The video tutorial explains the concept of air as a mixture of gases that form Earth's atmosphere, essential for life. It covers the composition of air, including nitrogen, oxygen, and carbon dioxide, and the role of gravity in maintaining the atmosphere. The tutorial describes the four layers of the atmosphere: troposphere, stratosphere, mesosphere, and thermosphere, and their characteristics. It concludes with a reflection on why there is no air in space.

What is the primary reason for the blue color of the sky?

• Reflection of ocean water

• Reflection of sunlight by the moon

• Scattering of sunlight by atmospheric gases

• Absorption of sunlight by clouds

How does the Earth's atmosphere support life?

• By providing a habitat for marine life

• By reflecting harmful solar radiation

• By acting as a barrier against space debris

• By supplying oxygen and enabling photosynthesis

Which gas is not a major component of Earth's atmosphere?

• Helium

• Oxygen

• Argon

• Nitrogen

Why is it harder to breathe at higher altitudes?

• The air is colder

• The air is less dense

• There is more carbon dioxide

• There is less nitrogen

In which layer of the atmosphere do airplanes typically fly?

• Troposphere

• Stratosphere

• Thermosphere

• Mesosphere

What happens to gases in the thermosphere?

• They escape into space

• They break down

• They freeze

• They become denser

What is the exosphere?

• The layer closest to Earth's surface

• The layer where clouds form

• The boundary of Earth's atmosphere

• The layer where weather occurs