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1. According to the theory of plate tectonics, the movement of plates can form mountain ranges and valleys. Within the next 100 million years, the Great Rift Valley in Africa will most likely become a A) folded mountain range B) flat eroded plain C) desert covered with lava D) wider and deeper valley NAEP released item, grade 12 Key 1. According to the theory of plate tectonics, the movement of plates can form mountain ranges and valleys. Within the next 100 million years, the Great Rift Valley in Africa will most likely become a A) B) C) D) folded mountain range flat eroded plain desert covered with lava wider and deeper valley 2005 National Performance Results Score Percentage of Students Correct 56% Incorrect 43% Omitted 0% Note: • • These results are for public and nonpublic school students. Percentages may not add to 100 due to rounding. The Fields of Science: Earth & Space Sciences (Sub content classification: Solid Earth) Knowing and Doing Science : Conceptual Understanding NAEP released item, grade 12 The Fields of Science Earth & Space Sciences This question measures basic knowledge and understanding of the following: Solid Earth • • • • • • Composition of the Earth; Forces that alter the Earth's surface; Rocks: their formation, characteristics, and uses; Soil, its changes and uses; Natural resources used by humankind; and Forces within the Earth (not in grade 4). Knowing and Doing Science Conceptual Understanding Conceptual understanding includes the body of scientific knowledge that students draw upon when conducting a scientific investigation or engaging in practical reasoning. Essential scientific concepts involve a variety of information, including facts and events the student learns from both science instruction and experiences with natural environment; and scientific concepts, principles, laws, and theories that scientists use to explain and predict observations of the natural world. NAEP released item, grade 12