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Self Starters November • a5. Which best finishes this analogy: An egg is to a cake what at mineral is to a _____. • • • • A. B. C. D. atom cell streak rock • b11. Why are rocks and minerals necessary to our civilization? • • • • A. B. C. D. for jewelry and decoration to build machines and buildings to make our food and water from to make into clothing and shoes. • b6. Which of the following processes are required in the formation of all igneous rock? • A. Complete melting • B. Erosion • C. Deposition • D. Compaction • a4. Which assumption must scientists make about the rock cycle? • A. igneous rocks cannot change into other rocks because they are already changed. • B. rocks are formed in Earth’s center and rise to the crust to form the soil. • C. igneous rocks form in volcanoes and then erode to form metamorphic rocks. • D. rocks in ancient times weathered, eroded and deposited as they do today. • c12. A sample of rock has visible foliations (bands) of alternating dark and light colored crystals. Which type of rock is the sample? • A. igneous • B. sedimentary • C. metamorphic • D. Not enough information to answer. • c14. A sample of rock has no visible foliations (bands) or crystals but does contain gas bubbles. Which type of rock is the sample? • A. igneous • B. sedimentary • C. metamorphic • D. Not enough information to answer. • c15. How are igneous rocks grouped? • A. by the shape and size of the rock sample • B. by how quickly the molten magma cooled • C. by the place in the world the sample was found. • D. by whether there are layers or bands • a1. Why are sedimentary rocks often formed in large, flat layers? • A. Flat layers are formed whenever magma flows outward from Earth. • B. Sediments find flat surfaces on Earth to collect. • C. Sediments usually collect on Earth’s surface as flat deposits. • D. Heat and pressure cause sediments to flatten out into sheets. • b4. According to scientific assumptions, which rock layers in the Grand Canyon will usually contain older fossils? Those found: • A. nearer to the surface or the top of the canyon. • B. at the edge of a cliffs. • C. in rock layers located half way down the canyon. • D. in the rock layers located deep in the canyon.