Our Changing Earth Class 7 MCQs with Answers
Our Changing Earth Class 7 MCQs with Answers
Class: 7 |
Subject: Social Science |
Section: Geography – Our Environment |
Topic: Our Changing Earth
These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 7 Social Science Examination preparation.
1. Which forces originate inside the Earth?
Answer: A. Endogenic forces
Endogenic forces act from within the Earth. They cause earthquakes, volcanic eruptions, folding, and faulting that change the Earth’s surface.
Endogenic forces act from within the Earth. They cause earthquakes, volcanic eruptions, folding, and faulting that change the Earth’s surface.
2. Forces acting on the Earth’s surface are called:
Answer: B. Exogenic
Exogenic forces include wind, water, ice, and waves. They wear down landforms through erosion and deposition.
Exogenic forces include wind, water, ice, and waves. They wear down landforms through erosion and deposition.
3. Sudden movements of the Earth are called:
Answer: C. Sudden forces
Sudden movements like earthquakes and volcanoes occur quickly and cause immediate changes on Earth’s surface.
Sudden movements like earthquakes and volcanoes occur quickly and cause immediate changes on Earth’s surface.
4. The place where an earthquake originates is called:
Answer: A. Focus
The focus is the point inside the Earth where earthquake energy is first released. The epicentre lies directly above it on the surface.
The focus is the point inside the Earth where earthquake energy is first released. The epicentre lies directly above it on the surface.
5. Vibrations caused by earthquakes are called:
Answer: B. Seismic waves
Seismic waves travel through Earth’s layers and are recorded by seismographs to measure earthquake intensity.
Seismic waves travel through Earth’s layers and are recorded by seismographs to measure earthquake intensity.
6. The Richter scale measures:
Answer: C. Earthquake magnitude
The Richter scale measures the energy released during an earthquake. Higher numbers indicate stronger quakes.
The Richter scale measures the energy released during an earthquake. Higher numbers indicate stronger quakes.
7. A crack in the Earth’s crust is called:
Answer: B. Fault
Faults occur when rocks break due to tectonic stress, often causing earthquakes.
Faults occur when rocks break due to tectonic stress, often causing earthquakes.
8. Which landform is formed by river deposition?
Answer: B. Delta
Deltas form when rivers deposit sediments at their mouths, creating fertile triangular landforms.
Deltas form when rivers deposit sediments at their mouths, creating fertile triangular landforms.
9. The wearing away of landscapes is called:
Answer: B. Erosion
Erosion removes soil and rocks by agents like water, wind, and ice.
Erosion removes soil and rocks by agents like water, wind, and ice.
10. Breaking of rocks without movement is:
Answer: B. Weathering
Weathering disintegrates rocks in situ due to temperature, water, and biological activity.
Weathering disintegrates rocks in situ due to temperature, water, and biological activity.
11. Sea caves are formed by:
Answer: C. Sea waves
Continuous wave erosion hollows coastal rocks to form caves.
Continuous wave erosion hollows coastal rocks to form caves.
12. Mushroom rocks are formed in:
Answer: A. Deserts
Wind erosion shapes rocks into mushroom forms by eroding the lower portion faster.
Wind erosion shapes rocks into mushroom forms by eroding the lower portion faster.
13. Which agent forms U‑shaped valleys?
Answer: B. Glacier
Glaciers carve broad U‑shaped valleys as they move downhill.
Glaciers carve broad U‑shaped valleys as they move downhill.
14. Flood plains are formed by:
Answer: B. Rivers
During floods, rivers deposit fertile soil along banks forming flood plains.
During floods, rivers deposit fertile soil along banks forming flood plains.
15. Volcanic eruptions are examples of:
Answer: C. Endogenic forces
Volcanoes originate from magma inside Earth, making them internal forces.
Volcanoes originate from magma inside Earth, making them internal forces.
16. Lava plateaus are formed by:
Answer: C. Volcanic eruptions
Repeated lava flows spread and solidify to form plateaus like the Deccan Plateau.
Repeated lava flows spread and solidify to form plateaus like the Deccan Plateau.
17. Which process lays down sediments?
Answer: C. Deposition
Deposition is the accumulation of sediments transported by agents.
Deposition is the accumulation of sediments transported by agents.
18. Earth’s surface changes mainly due to:
Answer: B. Forces
Both endogenic and exogenic forces continuously reshape Earth.
Both endogenic and exogenic forces continuously reshape Earth.
19. Meanders are formed by:
Answer: B. Bending rivers
Sideways erosion and deposition create river bends called meanders.
Sideways erosion and deposition create river bends called meanders.
20. Which is NOT an agent of erosion?
Answer: D. Sunlight
Sunlight causes weathering but is not a direct agent transporting sediments like wind, water, or ice.
Sunlight causes weathering but is not a direct agent transporting sediments like wind, water, or ice.