SCI 256 Week 5 Final Exam Guide/Uoptutorial

8. Decreased death rate and the accelerated rate of human population growth are related to:I. improved sanitation and healthII. increased food supplyIII. control of disease-spreading organisms9. Which of the following cycles involves the movement of water from the surface of theEarth through the atmosphere back to the surface of the Earth?10. The substance with the greatest significance for the global carbonate-silicate cycle is:11. According to the Environmental Science text, an ecosystem:12. Which of the following statements is true about omnivores?13. In the open ocean, the first trophic level is composed primarily of:14. Firewood is the primary source of fuel for cooking and heating in many cultures.Approximately what percentage of the world's total energy use involves firewood?15. Gradual, sequential changes in the composition of an ecosystem, particularly followingan initial disturbance is called:16. Since the extensive fires in Yellowstone National Park in 1988, the park often has beencited as an example of the connection between forest fire and natural succession. An importantpart of understanding the danger of wildfire in Yellowstone is understanding its history. Fromthe time of the founding of the park in 1872 until 1963, what was the policy regarding wildfires?17. What is the most important cause of starvation worldwide?