Analyze these two photomicrographs of ice czrystals (snowflakes) by William Bent
ID: 152459 • Letter: A
Question
Analyze these two photomicrographs of ice czrystals (snowflakes) by William Bentley (Fig. A3.2.5). 1. Both ice crystals have the same number of arms that radiate out from the center. How many arms do ice crystals have 2. There are seven different crystal systems: triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic. Using the number of arms on a snowflake as a hint, what crystal system do ice crystals belong to? What is the basis for your interpretation:? 0.1 m hich of the crystal forms shown in Fig. 3.5 or crystal habits shown in Fig. 3.6 do you recognize in the ice crystals? 4. Why do you think ice crystals do not all have the saune shape Figure A3.2 ze each crystalline household material pictured below (Figs. A3.26-AS observe actual samples of the materials if they are available.)Explanation / Answer
Answer :
1. Ice crystals have six arms.
2. The six-fold symmetry of a snow or ice crystal is derived ultimately from the hexagonal geometry of the ice crystal lattice. The 6-fold symmetry gets started due to the hexagonal crystalline structure of ice when it has the shape of a tiny hexagon. Then the six arms of the ice crystal or snowflake begins to grow independently from each corner of the minute hexagon.
3. Please provide figure 3.5 and 3.6
4. Ice crystals do not all have the same shape because the shape of the crystal is largely influenced by the temperature and humidity of the atmosphere in which it forms. Depending upon the humidity and temperature of the air where the crystal forms, the resulting crystal will grow into a variety of different shapes.