Our Changing Earth
12 solved questions from Class 7 Geography, each with the full working. Tap any question to see the step-by-step solution.
- 1 Why is the theme of 'Our Changing Earth' important in Social Science? medium MCQ Social Significance
- 2 Which key factor is highlighted in the study of 'Our Changing Earth'? medium MCQ Key Factors & Analysis
- 3 What lesson can be drawn from the study of 'Our Changing Earth' in modern context? hard MCQ Modern Relevance
- 4 Which source or evidence is commonly used to study 'Our Changing Earth'? medium MCQ Sources of Information
- 5 What is the primary topic or theoretical principle explored in 'Our Changing Earth' (Class 7 GEOGRAPHY)? medium MCQ Chapter Core Principle
- 6 Which key mechanism or analytical rule is highlighted in 'Our Changing Earth'? medium MCQ Key Analytical Mechanism
- 7 If a tectonic plate moves at a speed of 4 cm per year, how far will it travel in 10 years? medium 2 marks Plate motion calculation
- 8 A volcano in a continental region erupted and produced a lava flow of volume 20 million cubic metres covering an area of 25 km². Estimate the average thickness of the lava flow in metres. hard 4 marks Volume and area relation in geology
- 9 Calculate the distance travelled by a tectonic plate in 12 years if it moves at a speed of 3 cm per year. Express your answer in kilometres. easy 1 mark Tectonic plate movement
- 10 Which of the following seismic waves travels fastest through the Earth's interior? A. S-wave B. P-wave C. Love wave D. Rayleigh wave medium MCQ 2 marks Seismic wave speed
- 11 During a volcanic eruption, an ash cloud covers a region of 400 km². If the average thickness of the ash deposit is 0.5 m, calculate the total volume of ash deposited in cubic metres. Then discuss how this volume can affect crop yield in the region. hard 5 marks Volcanic ash volume and impact
- 12 A volcano erupts, depositing 12 million cubic metres of lava over an area of 40 km². Calculate the average thickness of the lava flow in metres and discuss how such a thickness could influence local agriculture. hard 4 marks Lava flow thickness and agricultural impact