Analyze these two photomicrographs of ice crystal (snonflakes) by William Bentle
ID: 154268 • Letter: A
Question
Analyze these two photomicrographs of ice crystal (snonflakes) by William Bentley (Fig. A325). 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 syssems triclinik monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic. Using the number of arms on a snowflake as a hint, what crystal system do ike crystals belong to? What is the basis for your interpretation? 0.1 mm S. Which of the crystal forms shown in Fig. 3.5 or crystal habits shown in Fig. 3.6 do you recognize in the ice crystals? OR 4. Why do you think ice crystals do not all have the same shape? Figure A3.25 the JAnalyze each crystalline houschold material pictured below (Figs. A3.2.6-A3.28). (Use a hand lens or microscope to observe actual samples of the materials if they are available.) Figure A32.6 Figure A3.27 Figure A3.2.8 I. Sucrose (table sugar) displays the following crystal form(s) or habit (Figs. 3.5 and 3.6): How can you tell? 2. Epsomite (epsom salt) displays the following crystal form(s) or habit (Figs. 3.5 and 3.6) How can you tell? Halite (table salt) displays the following crystal form(s) or habit (Figs. 3.5 and 3.6 How can you tell? 3. 4. REFLECT &DISCUSS Which of these crystalline household materials (sucrose, epsomite, or halite) is nota mineral? Why not?Explanation / Answer
Answers:
Answer 1: The crystals have 6 radiating arms.
Answer 2: Hexagonal structure evident by the 6-fold symmetry of the structure (consider each arm as the axis of symmetry and you get 6-fold symmetry).
Answer 3:Do not have attached necessary images. The numbering of images is different.
Answer 4: The shape of ice structure depends on the temperature, water vapour content and other impurities that can be from pollen, pollution and dust. The higher the moisture content, the bigger the crystals. Thus even clouds that forms the ice crystal, determine the size and shape of the crystal.
Please post the next section of question separately.