4. a sieve analysis were conducted on a soil sample. the results are given as follows: sieve # opening size (mm) 4.75 10 20 40 60 100 200 pan total remaining mass (gr) 9.7 39.5 71.6 129.1 107.4 105 8.5 1.3 472.1 0.84 0425 025 0.15 0.075 a) determine the percentage of gravel, sand, and fines b) determine the mean diameter c classify the soil sample using the uscs and aashto classification systems

Adesert is an example of a(n) and the gobi desert is an example of a(n) a. ecosystem biome b. biome ecosystem c. ecosystem climate d. climate biome

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)