1. What is an erect plant with a single woody system called? A. Bamboo B. Grass C. Shrub D. Tree 2. What is the major source of fiber from production of pulp and paper? A Lumber B. Rayon C. Wood D. Wheat 3. What are the two gases produced by plants and humans? A Nitrogen and Oxygen B. Oxygen and Carbon Dioxide C. Carbon Dioxide and Helium 4. What benefit is derived from trees to maintain a healthy environment? A. They serve as valuable wildlife habitats. B. They can be used as treehouses to play. C. They can be used as firewood. D. They can be a good hiding place. 5. What is prevented when you plant trees in areas that experience heavy rainfall? A. Earthquake B. Erosion C. Flooding D. Weathering 6. Why do trees reduce the destruction of home and agricultural crops? A. They serve as shelter for animals. B. They serve as windbreakers during typhoons. C. They are used as wood for houses. D. They give us shade when it's too hot.
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