In Earth's atmosphere, where is the ozone layer?

Question

BlackTom AI · Accepted Answer

Question: In Earth's atmosphere, where is the ozone layer?

Option 1: stratosphere. This choice correctly identifies the ozone layer as located in the stratosphere, the atmospheric layer above the troposphere where ozone concentration is highest and plays a key role in absorbing most of the Sun's ultraviolet radiation.

Option 2: troposphere. The troposphere is the lowest layer of the atmosphere where weather occurs, but the ozone concentration here is much lower and there is no stable, globally significant ozone layer.

Option 3: biosphere. The biosphere encompasses all living systems on Earth and is not a vertical atmospheric layer; it does not describe a region of the atmosphere where ozone is concentrated.

Option 4: mesosphere. The mesosphere lies above the stratosphere and below the thermosphere, and while it contains some ozone, the major ozone layer is not located here; this region does not host the peak ozone concentration that constitutes the ozone layer.

Putting the pieces together, you’re looking for the atmospheric zone that houses the bulk of atmospheric ozone and provides the protective UV shielding: the stratosphere. The other options do not align with the well-established spatial distribution of ozone in the atmosphere.

In Earth's atmosphere, where is the ozone layer?单项选择题

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