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GEO Team Practice Test Question Stems ____ 1. What is a naturally occurring, inorganic solid with an orderly crystalline structure and a definite chemical composition? ____ 2. The process of mineral formation from magma is called ____. ____ 3. Which of the following properties is generally the least useful in identifying minerals? ____ 4. The appearance or quality of light reflected from the surface of a mineral is called ____. ____ 5. The resistance of a mineral to being scratched is called ____. ____ 6. The color of the powdered form of a mineral is called ____. ____ 7. What is the hardness of an unknown mineral that scratches glass, but will not scratch quartz? ____ 8. The tendency of minerals to break along smooth flat surfaces is called ____. ____ 9. What is density of a mineral? ____ 10. What is the density of a mineral with a mass of 41.2 g and a volume of 8.2 cm ? ____ 11. How could you determine if a sample of gold is pure? ____ 12. In Figure 3-1, what type of rock should occur in the part of the rock cycle labeled B? ____ 13. In Figure 3-1, what process or processes would be occurring in the part of the rock cycle labeled E? ____ 14. A rock that forms from cooling lava is classified as an ____. ____ 15. When large masses of magma solidify far below Earth’s surface, they form igneous rocks that have a ____. ____ 16. Lava that cools so quickly that ions do not have time to arrange themselves into crystals will form igneous rocks with a ____. ____ 17. As the rate of cooling of igneous rocks increases, the size of the crystals that form ____. ____ 18. What type of boundary occurs where two plates move together, causing one plate to descend into the mantle beneath the other plate? ____ 19. New ocean crust is formed at ____. ____ 20. Deep ocean trenches are associated with ____. ____ 21. What feature is labeled B in Figure 9-1? ____ 22. If a deep ocean trench is located adjacent to a continent, active volcanoes would likely be found ____. ____ 23. The Hawaiian Islands were formed when the Pacific Plate moved over ____. ____ 24. Which list places the magma types in order of decreasing viscosity (most viscous listed first)? ____ 25. Which of the following is NOT a factor affecting how violently or quietly a volcano erupts? ____ 26. Highly explosive volcanoes tend to have what type of magma? ____ 27. What type of volcano is built almost entirely from ejected lava fragments? ____ 28. The broad, slightly dome-shaped volcanoes of Hawaii are ____. ____ 29. What feature is labeled D in Figure 10-1? ____ 30. What type of volcano is illustrated in Figure 10-1? ____ 31. Which of the following is true about cinder cones? ____ 32. The most violent volcanic eruptions are associated with what type of volcano? ____ 33. The dating process that places geologic events in proper sequence is referred to as a ____. ____ 34. The time it takes for 50% of the nuclei in a radioactive sample to decay to its stable isotope is called ____. ____ 35. Assume you began with 10 g of a radioactive parent isotope. How many grams of parent isotope will be present in the sample after 2 half-lives? ____ 36. According to Figure 12-2, what fraction of the original parent isotope still exists after 4 half-lives have passed? ____ 37. A sample is brought to the laboratory and it is determined that one-eighth of the original parent isotope remains in the sample. Use Figure 12-2 to determine the age of the sample if the half-life of the material is 60 million years. ____ 38. What is the scale of a model airplane if the model is 3 meters long and the real plane is 6 meters long? ____ 39. What is the scale of a solar system model if Earth is 1 cm in diameter (.00001 km) and the real Earth is 12,742 km? ____ 40. How far away is Earth from the sun in a 1:1,000,000 scale model? (real distance 150,000,000 km) ____ 41. Why could you not draw the planets to scale on your 1 meter scale model? ____ 42. A true scale model of the solar system in which you can see the planets: ____ 43. How long would it take to ride a bike to the Moon at 20 km/hr? (distance 384,400 km) ____ 44. How long would it take Voyager 1 at its max speed of 62,136 km/hr to travel from Earth to Sun? Astronomy Targets: 1. I can calculate a model scale. 2. I can create a scale model of the solar system. 3. I can calculate travel times in space.