Question

match the description with the layers of the atmosphere.
a. 90% of the ozone layer is found in the upper crust of this layer.
b. contains ultraviolet radiation that create ions.
c. all weather conditions take place here.
d. temperature decreases as altitude increases.

1. troposphere.
2. stratosphere.
3. mesosphere.
4. thermosphere.

Explanation:

• For description a: The stratosphere (2) has 90% of the ozone layer in its upper part, as ozone absorbs UV and is concentrated here.
• For description b: The thermosphere (4) has ultraviolet radiation that creates ions (ionosphere is part of thermosphere).
• For description c: The troposphere (1) is where all weather occurs, as it's the lowest layer with weather - related processes.
• For description d: The mesosphere (3) has temperature decreasing with increasing altitude (opposite of stratosphere and thermosphere in some aspects).

Answer:

a. 2. Stratosphere
b. 4. Thermosphere
c. 1. Troposphere
d. 3. Mesosphere