Geography Chapter Five Study Guide: The Earth's Natural Resources Mr. Kersey Directions: Use this sheet as a guide to help you prepare for the upcoming test. You should be able to discuss and give examples of the following terms and concepts in two or three complete sentences each. all key terms (from the book and from our list) natural resources and why they are important the three types of resources energy and why it is important sources of energy land use and the 3 stages of resource development compare/contrast developed countries and developing countries challenges faced by developing nations people's effect on the environment effects of pollution types of pollution causes of air and water pollution endangered species acid rain rivers, sewage, and our water supply the ozone layer and the greenhouse effect how are energy, fossil fuels, and pollution related? for additional review help, complete the chapter review on pages 124-125. good luck!