challenges when forecasting the weather

Question 1

1. If a single ice crystal grows by vapour diffusion what shape is it likely to be if the temperature is:
   a) -15C

Answer 1

) Stellar or plate or hexagonal plate

Question 2

If a single ice crystal grows by vapour diffusion what shape is it likely to be if the temperature is:) -5C

Answer 2

) column or needle

Question 3

If a single ice crystal grows by vapour diffusion what shape is it likely to be if the temperature is: these two ice crystals collide to form a new larger one what is that process called?

Answer 3

Aggregation process