Before becoming glacial ice, compact granular snow melts and refreezes into the substance called ____________________, with a density of about 0.5 grams per cubic centimeter
Fill in the blank(s) with correct word
firn
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Which of the following is not a characteristic of quartz?
A. commonly occurs in six-sided crystals B. hardness of 7 C. one direction of cleavage D. conchoidal fracture E. made up of SiO2
What type of migration pattern would it be if you moved from Chicago to Los Angeles?
A. partial displacement B. step C. external D. total displacement
We calculate BSS = 10 * (540.3 - 543.6)2 + 16 * (602.9 - 543.6)2 + 17 * (489.8 - 543.6)2 = 105578.2 WSS = (10 - 1) * 46.42 + (16 - 1) * 47.42 + (17 - 1) * 48.92 = 91337.4 F = (BSS / (k-1)) / (WSS / (n-k)) = (105578.2 / (3 - 1)) / (91337.4 / (43 - 3)) = 23.1 The critical F value is F.05,2,40 = 3.23. The observed value vastly exceeds this, so we clearly reject the null hypothesis and conclude that the means differ across the groups.
The width of growth rings in which of the following materials can provide a record of climate?
a. Trees b. Shells c. Corals d. All of the above e. Both and b