All chapters of class 7 science notes are present in this category .
III. 1. What is thermal energy? Ans: The sum of energy possessed by all the molecules in motion is the thermal energy of the substance. 2. What does the temperature of a substance indicate? Ans: Temperature of a substance indicates whether it is hot or cold. 3. Define heat? Ans: Heat is the thermal energy which flows. … Read more
II. 1. It absorb good amount of moisture without becoming damp . Ans: Wool. 2. It is secreted by a caterpillar. Ans: Silk. 3. It is flame resistant. Ans: Wool. 4. It is the most popular fabric for tailoring fine garments. Ans: Woollen fabric . 5. It can be dyed easily and is very elastic. Ans: Silk. III. 1. What is … Read more
III. Q. It digests carbohydrates ,proteins and fats in the small intestine . Ans 1. Pancreatic juice . Q. It transports the nutrients from the digested food to every cell of the body. Ans 2. Blood. Q. It breaks down starch into sugar in the mouth. Ans 3. Amylase. Q. It produces bile … Read more
III. Q. What is nutrition? Ans 1. The process of taking in food and using it for growth , repair and other processes to maintain life is called nutrition. Q. Are birds autotrophs ? Ans 2. No, birds are not autotrophs. Q.What is a heterotroph? Ans 3. Organisms which cannot produce their own … Read more