Crct Science 8Th Grade

2659 Words11 Pages
Which form of energy is produced from human-made materials? A. geothermal B. wind C. solar D. synthetic fuel ID:68999 A 2. It is safe to perform a lab experiment without goggles when A. massing soil samples. B. chipping rock samples. C. mixing very weak acids. D. heating small quantities. ID:57858 A 3. Since some power plants are built near the ocean, they can pollute the water. One way this occurs is when warm wastewater is pumped into cool seawater, killing cool-water organisms. This type of pollution is known as A. thermal pollution. B. chemical pollution. C. sediment pollution. D. convection pollution. 4. LINK ITEM 67 PLEASE GO ON TO THE NEXT PAGE. GA 2002 Gr8 REMSS SCIENCE ID:69102 B 5. When scientists “seed” a cloud to produce rain, they are trying to change the water cycle by altering A. accumulation. B. condensation. C. runoff. D. evaporation. ID:62335 C 6. Which statement about mountains BEST describes the surface of Earth over time? A. Flat surfaces are gradually pushed together into higher mountains until Earth is covered with mountains. B. Mountains gradually erode until most of Earth is at sea level. C. Mountains gradually erode, and new mountains are continuously formed. D. Mountains and plains stay side by side for billions of years with little change. ID:69125 A 7. By observing the characteristics of the Sun, people can learn more about A. stars. B. comets. C. distant planets. D. the Moon. ID:62096 OT106-tempseale B 8. LINK ITEM ID:57855 D 9. An underwater mountain chain that forms on the ocean floor is known as a A. continental shelf. B. rift zone. C. continental slope. D. mid-ocean ridge. 68 PLEASE GO ON TO THE NEXT PAGE. GA 2002 Gr8 REMSS SCIENCE ID:56506 D 10. Beth wants to find out if the lake in her town contains pollutants. The best way for Beth to gather these data would be
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