5. what type of clouds can be found in the mesosphere?
nimbus
cumulus
noctilucent
stratus

Some material from meteors lingers in the mesosphere, causing this layer to have a relatively high concentration of iron and other metal atoms. Very strange, high altitude clouds called "noctilucent clouds" or "polar mesospheric clouds" sometime form in the mesosphere near the poles.

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i think it's c. i'm not sure but i think so.