Class 9 Social Science Chapter 2: Shaping of the Earth’s Surface — practice questions with answers
Free practice for Class 9 Social Science, Chapter 2: Shaping of the Earth’s Surface. Try the solved questions below, then take a free test with instant marking and explanations.
56 questions15 easy, 30 medium, 11 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. What does the theory of plate tectonics describe?
- Large pieces of the Earth’s crust moving slowly over the semi-molten mantle
- The Earth standing completely still
- Rivers carving valleys
- The movement of clouds
Show answer
Answer: A. Large pieces of the Earth’s crust moving slowly over the semi-molten mantle
Why: Plate movement creates mountains, volcanoes and valleys. [p.13]
Why: Plate movement creates mountains, volcanoes and valleys. [p.13]
Q2. The crust is about 30 km thick under continents and about 5 km under oceans. How many times thicker is continental crust?
Show answer
Answer: 6 (± 0)
Why: 30 ÷ 5 = 6 times. [p.14]
Why: 30 ÷ 5 = 6 times. [p.14]
Q3. The mantle is about 2900 km thick and the outer core about 2200 km. What is their combined thickness (km)?
Show answer
Answer: 5100 (± 0)
Why: 2900 + 2200 = 5100 km. [p.14]
Why: 2900 + 2200 = 5100 km. [p.14]
Q4. Plant roots grow into cracks in a rock and split it apart. What type of weathering is this?
- Biological
- Chemical
- Physical due to frost only
- Erosion
Show answer
Answer: A. Biological
Why: Caused by plants, animals or microbes. [p.20]
Why: Caused by plants, animals or microbes. [p.20]
Q5. A limestone statue slowly wears away as acid rain reacts with it. What type of weathering is this?
- Chemical
- Biological
- Physical
- Glacial
Show answer
Answer: A. Chemical
Why: Reactions form new substances. [p.20]
Why: Reactions form new substances. [p.20]
Q6. How does erosion harm farmers?
- It removes fertile topsoil, lowering crop yields
- It adds fertile soil
- It increases rainfall
- It has no effect
Show answer
Answer: A. It removes fertile topsoil, lowering crop yields
Why: It also damages homes near rivers and coasts. [p.21]
Why: It also damages homes near rivers and coasts. [p.21]
Practise all 56 questions free
Timed test, marked instantly, with the correct answer and explanation for every question and a chapter-wise report.
Start the free testFrequently asked questions
How many practice questions are there for Class 9 Social Science Chapter 2: Shaping of the Earth’s Surface?
56 questions (15 easy, 30 medium, 11 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 9 Social Science syllabus, used by CBSE and many state boards.