NCERT Class 9 Science Chapter 1 Matter in Our Surroundings Solutions
NCERT Class 9 Science Chapter 1 Matter in Our Surroundings Solutions INTEX QUESTIONS AND ANSWERS 1. Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume. Ans. Chair, air, almonds and cold-drink are matter. 2. Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close. Ans. Particles in the air, if fueled with higher temperatures, acquire high kinetic energy, which aids them to move fast over a stretch. Hence, the smell of hot sizzling food reaches a person even at a distance of several meters. 3. A diver is able to cut through water in a swimming pool. Which property of matter does this observation show? Ans. A diver can cut through water in a swimming pool. The property of matter observed are this shows that the particles of matter have spaces between them. The intermolecular forces of attraction be...