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please Answer me the Following question......☺️
Que-1 Why do farmer use manure and fertilizers in their field???
Que-2 what is the stage called Puberty???
Que-3 Which gland produce thyroxine???
Que-4 State three conditions essential for combustion???
Que-5 What are natural and man-made material? give two example of each....???
And don't give unnecessarily Answers to me.... please....☺️
Answers
Answer:
Que-1:Fertilizers are used because they increase crop production. ... Manure and fertilisers replenish the soil by supply nutrients to the soil. *Manure is the organic matter added to the soil to replenish it with nutrients.
Que-2:Puberty is when a child's body begins to develop and change as they become an adult. Girls develop breasts and start their periods. Boys develop a deeper voice and facial hair will start to appear. The average age for girls to begin puberty is 11, while for boys the average age is 12.
Que-3:The thyroid gland uses iodine from food to make two thyroid hormones: triiodothyronine (T3) and thyroxine (T4). It also stores these thyroid hormones and releases them as they are needed. The hypothalamus and the pituitary gland, which are located in the brain, help control the thyroid gland.
Que-4:Heat,Oxygen and Fuel
Que-5:Man made materials are the materials which are created by man using the materials available to us by nature.examples are:pen,book,fan,cars,motorbikes,ships,submarines,plastic,computer,torch.
While natural things are the things avilable to us directly from nature.examples are:water,salt,coal,petrolium,wood,rubber,latex,diamond,gold,silver.
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