1) 1. A sudden movement along an underwater fault lifted part of the seafloor upward. How can this process lead to a tsunami? a) A. The movement pushes a large volume of water upward. b) B. Water becomes hotter and expands. c) C. The epicenter is always located in the ocean. d) D. P-waves and S-waves collide underwater. 2) 2. A town far from the epicenter felt weaker shaking compared to towns nearer it. Why does this happen? a) A. Magnitude decreases as you move away. b) B. Intensity depends on distance from the epicenter. c) C. The focus changes location during the quake. d) D. Only coastal areas feel strong shaking. 3) 3. A scientist observed that S-waves did not reach certain parts of the Earth during a major earthquake. How does this help scientists infer Earth's structure? a) A. S-waves melt when passing through hot rocks. b) B. S-waves cannot travel through liquids, revealing a liquid outer core. c) C. S-waves only travel through air, not solids. d) D. S-waves speed up in water, showing high density. 4) 4. After a magnitude 6.8 earthquake, engineers observed cracks near a known fault. How does this observation support the presence of an active fault? a) A. Earthquakes only happen in areas without faults. b) B. Visible cracks mean the fault has not moved recently. c) C. Movement causing damage indicates the fault is still active. d) D. All faults remain inactive unless underwater. 5) 5. Two cities experienced the same earthquake: City A had Intensity VII, City B had Intensity IV. Why is the intensity different? a) A. Intensity depends on how much energy the Earth releases. b) B. Intensity depends on distance from the epicenter and ground conditions. c) C. Intensity increases only in coastal regions. d) D. Intensity depends only on the magnitude number.

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