Some Natural Phenomena

10 solved questions from Class 8 Science, each with the full working. Tap any question to see the step-by-step solution.

• 1 What is the fundamental scientific concept introduced in the chapter 'Some Natural Phenomena'? medium MCQ Key Concept & Definition
• 2 Which of the following is an important application or observation related to 'Some Natural Phenomena'? easy MCQ Practical Application
• 3 What primary question does the chapter 'Some Natural Phenomena' aim to answer? medium MCQ Core Scientific Inquiry
• 4 Why is the study of 'Some Natural Phenomena' essential for students in class-8? hard MCQ Importance & Significance
• 5 Which key practice is recommended while studying topics in 'Some Natural Phenomena'? medium MCQ Scientific Method
• 6 What is the primary topic or theoretical principle explored in 'Some Natural Phenomena' (Class 8 SCIENCE)? medium MCQ Chapter Core Principle
• 7 Which key mechanism or analytical rule is highlighted in 'Some Natural Phenomena'? medium MCQ Key Analytical Mechanism
• 8 A magnitude 6.5 earthquake occurs. Estimate the total energy released using the empirical relation E = 10^1.5M+4.8 joules. Round to two significant figures. medium 2 marks Earthquake energy calculation
• 9 A magnitude 5.8 earthquake occurs. Estimate the total energy released using E = 10^1.5M+4.8 joules. Round to two significant figures. easy MCQ 2 marks Earthquake energy calculation
• 10 A scientist observes aurora bands at an altitude of 100 km. The Earth's magnetic field at that latitude is 5×10^-5 T. If the charged particles causing the aurora have kinetic energy 1 keV, calculate their speed. Assume the particles are electrons. hard 4 marks Aurora particle speed