. Light rays cannot pass through opaque objects. What is formed when this happens? * 1 point A. lightning B. rainbow C. thunder D. shadow 2. Why are shadows formed around us? They are formed when _________________________. * 1 point A. light rays pass through clear and tinted windows B. light rays are blocked by opaque objects C. the sun is setting in the west D.the sun is rising in the east 3. All of the statements describe the importance of the sun’s heat and light EXCEPT one. What is it? * 1 point A. The sun provides heat to warm the earth. B. The sun makes shadows possible to form. C. The sun helps bacteria to grow in decaying materials. D. The sun provides food for the people, plants and animals. 4. Why does shadow changes its length and position? * 1 point A. Shadow’s length depends on the position of the object. B. Shadow’s position depends on the length of the object. C. The shadow’s position and length depend on the position of an object. D. The shadow’s position and length depend on the position of the sun as it hits an object. 5. On Saturday, you went swimming with your friends in the nearby river. You noticed that your skin was reddish. What was the harmful effect of the sun’s heat to your skin? * 1 point A. Boil B. Cancer C. Sunburn D. Measles 6. What would be the probable effect if your eyes were exposed to the glares of the sun? * 1 point A. Eyes would become cross-eyed. B. Eyes would bulge. C. Vision would be impaired. D. You will suffer from glaucoma 7. When the intense heat is received on the earth’s surface and there is no rainfall at all, what would be its effect on the environment? * 1 point A. The soil would harden and crack and plant would wither. B. There would be scarcity of water. C. There will be abundance of water. D. Both A and B 8.Norma placed her anthurium plant outside her house before she left for Manila for two weeks. When she arrived, she noticed that her plant has withered and yet the soil was wet. What could have caused the withering of her plant? * 1 point A. Animals stepped