Q.3 Give scientific reasons .
1.Water is not used to control fires involving electrical equipment . .Global warming is a result of deforestation . 3.Chloroplasts are found only in plant cells .
4.Recycling of paper should be done .
5. A person is covered with a blanket when the clothes of tha
Answers
Answer:
1. Water is a conductor of electricity, so it can easily conduct electric current and cause danger of electric shocks or short-circuits. Therefore, water can not be used to control the fire involving electrical equipment.
2.The surplus carbon is stored in the plant, helping it to grow. When trees are cut down and burned or allowed to rot, their stored carbon is released into the air as carbon dioxide. And this is how deforestation and forest degradation contribute to global warming.
3.Chloroplasts are found in plant cells only because chloroplasts contain chlorophyll which is essential for photosynthesis.
Chlorophyll traps sunlight and uses it to prepare food for plants by the process of photosynthesis.
5.When the clothes of a person catch fire, the person is covered with a blanket to extinguish the fire. This is because the supply of air to the burning clothes is cut off by blanket, due to this the clothes stop burning and the fire gets extinguished.