Ice nuclei:
A) are particularly abundant in the lower levels of the troposphere.
B) rarely have six sides.
C) have a better chance of forming ice at temperatures below -10 degrees Celsius.
D) begin to serve their function once the temperature falls to 0 degrees Celsius.
Question 2
Heterogeneous nucleation:
A) cannot occur in the presence of hygroscopic particles.
B) can only occur at humidities in excess of 100 percent.
C) results in a water droplet that is 100 percent water.
D) requires condensation nuclei.
Synapomorphies at different levels
lower surface of Arabidopsis thaliana leaf, showing a trichome
The Upper Troposphere: Atmospheric Rivers
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