1. Directions: Choose the letter of the BEST answer. 1. How do forests protect our sources of water? A. They keep water in the streams. C. They let water flow to the lowlands. B. They use water for food making. D. They hold the water in the ground. 2. Which of the following is an effect of deforestation? A. forest fire C. decrease in water supply B. industrial pollution D. more oxygen 3. Which causes deforestation? A. reforestation B. contour farming C. illegal logging D. habitat restoration 4. Forest are called "lungs of the earth". Why? A. They supply the earth with oxygen. B. They supply the earth with carbon dioxide. C. They are the source of food for other organisms. D. They get their energy directly from the sun. 5. What is one way of conserving our resources? A. mining B. exploring C. recycling D. importing 6. Which of the following shows concern for the environment? A. burning of garbage in open areas C. hunting wildlife in the forest B. participating in 'clean and green' projects D. throwing wastewater into a river 7. Which of the following is a proof of environmental degradation? A. a polluted river C. Tubbataha Reef B. a virgin forest D. Mt. Makiling National Park 8. Which of the following destroys the balance of an ecosystem? A. planting more trees C. disruption of nutrient cycle B. recycling materials D. conservation of natural resources 9. The following are the ways of restoring habitats EXCEPT one. Which is it? A. reforestation C. building man-made sanctuaries B. mangrove rehabilitation D. buying products made from the body parts of animals 10. Which practice causes destruction of coral reef ecosystem? A. excessive fishing C. dynamite fishing B. pollution and oil spill D. all of these 11. How do forests help in maintaining global climate? A. Plants soak up large amounts of rainfall. B. Plants provide a habitat for plants and animals. C. Plants provide materials for constructions and other needs of people. D. Plants absorb carbon dioxide and release oxygen during photosynthesis. 12. What is NOT the benefit of coral reefs?
