प्रदूषण
प्रदूषण आज की दुनिया में उभरती उन चुनौतियों में से एक है, जो हमारे अस्तित्व को प्रत्यक्ष रूप से प्रभावित कर रही हैं। बढ़ती जनसंख्या, अनियंत्रित औद्योगिकीकरण और तेज़ी से बदलती जीवनशैली ने पर्यावरण को ऐसा नुकसान पहुँचाया है जिसकी भरपाई करना अत्यंत कठिन होता जा रहा है। वायु, जल, भूमि—तीनों ही स्तरों पर प्रदूषण … Read more
पेड़ की आत्मकथा
मैं एक पेड़ हूँ, जो बरसों से धरती की छाया बना हुआ हूँ। मेरा तना मज़बूत है और मेरी जड़ें धरती के भीतर गहराई तक फैली हुई हैं। दिन-रात मैं मौसमों की मार सहता हूँ, कभी तेज़ धूप मुझे जलाती है, तो कभी मूसलाधार बारिश मुझे भिगो देती है। फिर भी मुझे कोई शिकायत नहीं, … Read more
Confronting Marginalisation
1. “State one reason why you think reservations play an important role in providing social justice to Dalits and Adivasis.” Answer: Reservations help Dalits and Adivasis by giving them fair chances in education and jobs. Because these communities were kept away from good schools and jobs for many years, reservations make sure they get extra … Read more
CHAP-12: Grassroots Democracy – Part 3 Local Government in Urban Areas
LET’S EXPLORE (Page 174) Question: Why is a city like Kolkata, Chennai or Mumbai more complex and diverse than a village or a town? Answer: A city like Kolkata, Chennai, or Mumbai is more complex and diverse because it has many different kinds of people living together. In a city, people have different jobs, speak … Read more
Sound
Activity 11.1 Questions: “• Take a tuning fork and set it vibrating by striking its prong on a rubber pad. Bring it near your ear. • Do you hear any sound? • Touch one of the prongs of the vibrating tuning fork with your finger and share your experience with your friends. • Now, suspend … Read more
Human Resources
In-text Activity Question 1: “Study Fig. 5.1 and find out: of the world’s total population which continent has — (a) only 5 per cent (b) only 13 per cent (c) only 1 per cent (d) only 12 per cent” Answer: (a) North America has only 5% (b) Africa has only 13% (c) Oceania (Australia, New … Read more
Chap 2 : Acids, Bases and Salts
In-text Question (Page 18) Question: You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube? Answer: Dip the red litmus … Read more
chap 12 – Magnetic Effects of Electric Current
In-text Question (Page 195) Question: Why does a compass needle get deflected when brought near a bar magnet? Answer: A compass needle is actually a tiny bar magnet. When it is brought near another magnet (like a bar magnet), the magnetic field around the bar magnet acts on the compass needle. This magnetic force causes … Read more