Earth's Atmosphere and Life

The video tutorial explores Earth's atmosphere, highlighting its composition and the major layers: troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer's characteristics, such as the presence of life, weather phenomena, and protection from harmful solar radiation, are discussed. The video also covers the ozone layer's role in absorbing ultraviolet light and the significance of the thermosphere and exosphere in space activities.

Why is Earth the only known planet to support life?

• It has the largest size among planets.

• It has life-sustaining elements like land, air, and water.

• It is the closest planet to the sun.

• It has a thick atmosphere.

What percentage of Earth's atmosphere is composed of nitrogen?

• 1%

• 78%

• 21%

• 50%

In which layer of the atmosphere do humans live and most weather phenomena occur?

• Mesosphere

• Troposphere

• Exosphere

• Stratosphere

What is the primary function of the ozone layer in the stratosphere?

• To absorb harmful ultraviolet light from the sun.

• To support the flight of aircraft.

• To trap heat from the sun.

• To reflect radio waves.

Which layer of the atmosphere is known for being the coldest?

• Stratosphere

• Thermosphere

• Troposphere

• Mesosphere

Where do most meteors burn up upon entering Earth's atmosphere?

• Exosphere

• Mesosphere

• Stratosphere

• Troposphere

Which layer of the atmosphere is influenced by solar activity and can become extremely hot?

• Stratosphere

• Thermosphere

• Troposphere

• Mesosphere

In which layer do the space station and other spacecraft spend most of their time?

• Mesosphere

• Exosphere

• Stratosphere

• Thermosphere

What is the primary composition of the exosphere?

• Water vapor and dust

• Carbon dioxide and methane

• Helium and hydrogen

• Oxygen and nitrogen

Where do many satellites orbit around the Earth?

• Stratosphere

• Troposphere

• Mesosphere

• Exosphere