Directions and Analysis Task 1: Modeling the Solar System In this task, you will design a scale model of the solar system. A simple scale model would depict the Sun and eight planets to scale. Research online for resources that provide information on creating a model that scales up to the proper dimensions of the solar system. Use this site to calculate a scale for the various bodies in the solar system by specifying a fixed size for the Sun. (Note: distances between planets in the solar system are extremely large, so it is recommended to perform this task in an open park for best results.) Record your findings and provide a detailed explaination of how you visualized your scale model. Type your response here:

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

Classify the following soils according to the uscs classification system. provide appropriate uscs designations. a) this sample of well-graded gravel with sand was obtained from a large earthen dam in vancouver, canada. the sample has 73% fine to coarse sub-angular gravel, 25% fine to coarse sub-angular sand and 2% fines. the maximum size of the particles is 75 mm. the coefficient of curvature is 2.7, while the uniformity coefficient is 12.4. b) this dark brown and wet soil with a “strong organic odor” has 100% passing the no. 200 sieve. the liquid limit of the material is 32% when not dried and is 21% when oven-dried. the plastic index is 21% when not dried. c) this sand has 61% predominantly fine sand, 23% silty fines, and 16% fine sub-rounded gravel size. the maximum size is 20 mm. the liquid limit is 33% and the plastic limit is 27%. d) this soil has 74% fine to coarse sub-angular reddish sand and 26% organic and silty dark brown fines. the liquid limit is 37% when not dried and is 26% when oven dried. the plastic index is 6% when not dried.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by