Which one of the following is the correct sequence of layers as we move from the Earth’s surface upwards ?
Which one of the following is the correct sequence of layers as we move from the Earth’s surface upwards ? Correct Answer Troposphere, Stratosphere, Mesosphere, Thermosphere
The correct answer is Troposphere, Stratosphere, Mesosphere, Thermosphere.
Key Points
- Layers of Atmosphere
- The Earth's atmosphere has a series of layers, each with its unique characteristics.
- Going away from the ground level, these levels are called the troposphere, the stratosphere, the mesosphere, the thermosphere, and the exosphere. Hence, Option 2 is correct.
- The exosphere eventually slips away into the realm of interplanetary space.
- The troposphere:
- It is the lowest layer of our atmosphere.
- Starting at ground level, it stretches up to around 10 km above sea level.
- The stratosphere:
- It stretches from the tip of the troposphere to about 50 km above the earth.
- The notorious coating of ozone is contained inside the stratosphere.
- The mesosphere
- It reaches up to a height of around 85 km above our earth.
- A very unusual layer of air above the mesosphere is called the thermosphere.
- High-energy X-rays and UV radiation from the Sun are absorbed in the thermosphere, raising the temperature to hundreds or even thousands of degrees.
- The exosphere:
- It is the top layer of the Earth's atmosphere.
- It begins at an altitude of about 500 km and goes up to about 10,000 km.
- The ionosphere:
- It is the ionized component of the Earth's upper atmosphere, at an altitude of about 48 km to 965 km an area that covers the thermosphere and portions of the mesosphere and the exosphere.
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Feb 20, 2025