🌋 Class 7 Social Science (Geography)
Chapter 3 – Our Changing Earth (Full Details in English)
🧠 Multiple Choice Questions (MCQs) with Answers
1️⃣ The earth’s crust is broken into a number of huge pieces called —
(a) Plates
(b) Blocks
(c) Layers
(d) Mountains
👉 Answer: (a) Plates
2️⃣ The movement of these plates causes —
(a) Seasons
(b) Earthquakes, volcanoes, and formation of mountains
(c) Day and night
(d) Winds
👉 Answer: (b) Earthquakes, volcanoes, and formation of mountains
3️⃣ The movement of the plates is due to —
(a) Heat inside the earth
(b) Rotation of the earth
(c) Gravitational pull of the moon
(d) Winds
👉 Answer: (a) Heat inside the earth
4️⃣ The movement of plates is known as —
(a) Plate Tectonics
(b) Plate Division
(c) Plate Crust
(d) Plate Change
👉 Answer: (a) Plate Tectonics
5️⃣ When plates move towards each other, it is called —
(a) Convergent movement
(b) Divergent movement
(c) Transform movement
(d) Lateral movement
👉 Answer: (a) Convergent movement
6️⃣ When plates move away from each other, it is called —
(a) Convergent movement
(b) Divergent movement
(c) Transform movement
(d) Lateral movement
👉 Answer: (b) Divergent movement
7️⃣ When plates slide past each other, it is called —
(a) Transform movement
(b) Convergent movement
(c) Divergent movement
(d) Colliding movement
👉 Answer: (a) Transform movement
8️⃣ The sudden movement of the earth’s crust is known as —
(a) Volcano
(b) Earthquake
(c) Flood
(d) Cyclone
👉 Answer: (b) Earthquake
9️⃣ The place inside the earth where an earthquake originates is called —
(a) Epicentre
(b) Focus
(c) Centre
(d) Core
👉 Answer: (b) Focus
10️⃣ The point on the earth’s surface directly above the focus is called —
(a) Focus
(b) Epicentre
(c) Core
(d) Mantle
👉 Answer: (b) Epicentre
11️⃣ The scale used to measure the magnitude of an earthquake is —
(a) Celsius Scale
(b) Richter Scale
(c) Barometer
(d) Seismograph
👉 Answer: (b) Richter Scale
12️⃣ The instrument that records earthquake waves is called —
(a) Barometer
(b) Thermometer
(c) Seismograph
(d) Altimeter
👉 Answer: (c) Seismograph
13️⃣ Earthquake waves are called —
(a) Seismic waves
(b) Tidal waves
(c) Sound waves
(d) Radio waves
👉 Answer: (a) Seismic waves
14️⃣ The outermost layer of the earth is —
(a) Crust
(b) Mantle
(c) Core
(d) Magma
👉 Answer: (a) Crust
15️⃣ Most volcanoes are found along —
(a) Fold mountains
(b) Plate boundaries
(c) Plains
(d) Oceans
👉 Answer: (b) Plate boundaries
16️⃣ Molten rock inside the earth is called —
(a) Lava
(b) Magma
(c) Ash
(d) Coal
👉 Answer: (b) Magma
17️⃣ When magma comes out on the surface, it is called —
(a) Magma
(b) Lava
(c) Rock
(d) Sand
👉 Answer: (b) Lava
18️⃣ A vent in the earth’s crust through which molten material erupts is called —
(a) Volcano
(b) Crater
(c) Fault
(d) Rift
👉 Answer: (a) Volcano
19️⃣ The circular depression at the top of a volcano is called —
(a) Crater
(b) Core
(c) Rift
(d) Valley
👉 Answer: (a) Crater
20️⃣ The funnel-shaped mountain formed by the accumulation of lava is called —
(a) Volcanic mountain
(b) Fold mountain
(c) Block mountain
(d) Plateau
👉 Answer: (a) Volcanic mountain
21️⃣ Which of the following is an example of a volcanic mountain?
(a) Mt. Everest
(b) Mt. Kilimanjaro
(c) Aravalli Hills
(d) Himalayas
👉 Answer: (b) Mt. Kilimanjaro
22️⃣ The sudden shaking of the earth is caused by —
(a) Movement of tectonic plates
(b) Rain
(c) Winds
(d) Lightning
👉 Answer: (a) Movement of tectonic plates
23️⃣ The most destructive earthquakes occur —
(a) Near the surface
(b) Deep inside the earth
(c) In deserts
(d) Over oceans
👉 Answer: (a) Near the surface
24️⃣ Which of these is not a natural hazard?
(a) Earthquake
(b) Volcano
(c) Building collapse
(d) Tsunami
👉 Answer: (c) Building collapse
25️⃣ Tsunami is caused by —
(a) Earthquake under the sea
(b) Cyclone
(c) Volcano on land
(d) Wind
👉 Answer: (a) Earthquake under the sea
26️⃣ The largest earthquake ever recorded occurred in —
(a) Chile
(b) Japan
(c) India
(d) USA
👉 Answer: (a) Chile
27️⃣ The movement that causes mountains to rise is called —
(a) Endogenic movement
(b) Exogenic movement
(c) Atmospheric movement
(d) Oceanic movement
👉 Answer: (a) Endogenic movement
28️⃣ The movement that causes weathering and erosion is called —
(a) Endogenic movement
(b) Exogenic movement
(c) Volcanic movement
(d) Plate tectonic movement
👉 Answer: (b) Exogenic movement
29️⃣ The forces that act in the interior of the earth are called —
(a) Endogenic forces
(b) Exogenic forces
(c) Atmospheric forces
(d) Tectonic forces
👉 Answer: (a) Endogenic forces
30️⃣ The forces that act on the surface of the earth are called —
(a) Endogenic forces
(b) Exogenic forces
(c) Magnetic forces
(d) Volcanic forces
👉 Answer: (b) Exogenic forces
31️⃣ The formation of fold mountains is due to —
(a) Compression
(b) Tension
(c) Faulting
(d) Volcanic eruption
👉 Answer: (a) Compression
32️⃣ The formation of block mountains is due to —
(a) Faulting
(b) Folding
(c) Volcanic eruption
(d) Weathering
👉 Answer: (a) Faulting
33️⃣ Which of these is a fold mountain?
(a) Himalayas
(b) Aravallis
(c) Satpura
(d) Vindhya
👉 Answer: (a) Himalayas
34️⃣ Which of these is a block mountain?
(a) Vosges and Black Forest
(b) Himalayas
(c) Andes
(d) Rockies
👉 Answer: (a) Vosges and Black Forest
35️⃣ Which of these is an example of a volcanic mountain?
(a) Mt. Fujiyama
(b) Aravalli Hills
(c) Himalayas
(d) Alps
👉 Answer: (a) Mt. Fujiyama
36️⃣ The uppermost part of the volcano from which lava comes out is —
(a) Crater
(b) Cone
(c) Vent
(d) Magma chamber
👉 Answer: (c) Vent
37️⃣ The top layer of lava that cools quickly forms —
(a) Igneous rocks
(b) Sedimentary rocks
(c) Metamorphic rocks
(d) Fossil rocks
👉 Answer: (a) Igneous rocks
38️⃣ A seismograph records —
(a) Speed of wind
(b) Intensity of earthquake
(c) Temperature
(d) Rainfall
👉 Answer: (b) Intensity of earthquake
39️⃣ The main cause of weathering and erosion is —
(a) Water, wind and ice
(b) Earthquake
(c) Volcano
(d) Sunlight
👉 Answer: (a) Water, wind and ice
40️⃣ The highest earthquake-prone zone in India is —
(a) Zone V
(b) Zone I
(c) Zone II
(d) Zone III
👉 Answer: (a) Zone V
41️⃣ Himalayas were formed by —
(a) Folding of the crust
(b) Faulting
(c) Volcanic eruption
(d) Erosion
👉 Answer: (a) Folding of the crust
42️⃣ Aravalli hills are examples of —
(a) Old fold mountains
(b) Young fold mountains
(c) Block mountains
(d) Volcanic mountains
👉 Answer: (a) Old fold mountains
43️⃣ Andes mountains are found in —
(a) South America
(b) North America
(c) Europe
(d) Asia
👉 Answer: (a) South America
44️⃣ Which of the following is an example of endogenic force?
(a) Earthquake
(b) Rainfall
(c) River
(d) Wind
👉 Answer: (a) Earthquake
45️⃣ Which of the following is an example of exogenic force?
(a) River
(b) Volcano
(c) Earthquake
(d) Landslide
👉 Answer: (a) River
46️⃣ The movement of molten magma inside the earth is called —
(a) Convection current
(b) Volcanic flow
(c) Magma rise
(d) Lava flow
👉 Answer: (a) Convection current
47️⃣ The thickest part of the earth’s crust is under —
(a) Mountains
(b) Oceans
(c) Plains
(d) Rivers
👉 Answer: (a) Mountains
48️⃣ The thinnest part of the earth’s crust is under —
(a) Oceans
(b) Mountains
(c) Deserts
(d) Plains
👉 Answer: (a) Oceans
49️⃣ Rocks break down due to natural forces in a process called —
(a) Weathering
(b) Folding
(c) Erosion
(d) Uplift
👉 Answer: (a) Weathering
50️⃣ Continuous wearing down and rebuilding of the earth’s surface is called —
(a) Changing Earth
(b) Rock Cycle
(c) Evolution of landforms
(d) Plate movement
👉 Answer: (c) Evolution of landforms
🌎 Quick Revision Summary
| 🔹 Process | 🔹 Meaning | 🔹 Example |
|---|---|---|
| Endogenic Forces | Forces acting inside the Earth | Earthquakes, Volcanoes |
| Exogenic Forces | Forces acting on the surface | Wind, Water, Ice |
| Folding | Uplift of crust to form mountains | Himalayas |
| Faulting | Crust breaks forming block mountains | Vosges, Black Forest |
| Volcano | Opening in crust where lava erupts | Mt. Fuji, Mt. Kilimanjaro |
| Earthquake | Sudden shaking of Earth | Measured by Seismograph |
| Tsunami | Sea waves caused by earthquake under sea | Indian Ocean 2004 |