1. Choose the letter of the correct answer. 1. What is the main source of heat and light on Earth? A. Stars B. Comets C. Moon D. Sun 2. What kind of energy produced from the heat and light of the sun? A. Thermal energy B. Solar energy C. Wind Energy D. Geothermal energy 3. 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? 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 4. 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? A. Animals stepped on it. C. A stray animal uprooted it. B. Too much heat from the sun. D. Someone has destroyed it. 5. Paul brought his carabao to the grassland to graze. He left his animal under the sun the whole day. What would likely be the harmful effect of heat on his animal? His carabao would A. become sturdy. C. get sick B. have sunburn. D. become healthy.​