NCERT Class 8 Science Curiosity (Sanskrit): Chapter 6 — अध्यायः ६ प्रबलता, वायुः, झञ्झावात, चक्रवातश्च
This chapter, 'प्रबलता, वायुः, झञ्झावातः, चक्रवातश्च' (Force, Wind, Storm, Cyclone) from NCERT Class 8 Science Curiosity, explores the relationship between force and pressure. It begins by posing questions about why wind is sometimes stronger, why water tanks are elevated, and the causes of storms and cyclones. The text explains that wind exerts force, causing effects like leaves swirling and trees swaying. It introduces the concept of pressure as force acting on a unit area, using the example of carrying a bag with narrow versus broad straps. The chapter highlights that a wider strap distributes the weight over a larger area, making it more comfortable to carry, even if the total weight is the same. This foundational understanding of pressure is crucial for comprehending various natural phenomena discussed later in the chapter, aiding students in their CBSE science learning.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 8 |
| Subject | Science |
| Book | Curiosity (Sanskrit) |
| Chapter | Chapter 6 — अध्यायः ६ प्रबलता, वायुः, झञ्झावात, चक्रवातश्च |
| Language | Sanskrit |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 2 minutes |
| Word count | 276 |
Learning outcomes
- Understand the relationship between force and pressure.
- Explain why wind can cause objects to move.
- Differentiate between carrying loads with narrow and broad straps.
- Define pressure as force per unit area.
- Begin to comprehend the causes of natural phenomena like storms and cyclones.
Vocabulary
| Word | Meaning |
|---|---|
| वायुः | Wind |
| प्रबलः | Strong |
| झञ्झावातः | Storm |
| चक्रवातः | Cyclone |
| बलम्् | Force |
| भारः | Weight/Load |
| क्षेत्रफलम्् | Area |
| चापः | Pressure |
| स्यूतः | Bag/Sack |
| पट्टिưका | Strap |
The complete chapter text is read in the official NCERT PDF viewer below (streamed from ncert.nic.in). This page provides NCERT Help study material — summary, vocabulary, practice questions, and FAQs — not a full reproduction of the textbook.
Read chapter online
This PDF is loaded from the official NCERT website (ncert.nic.in). Use the page buttons below to read — download is disabled on NCERT Help.
Read page by page below. PDF is streamed from the official NCERT website — no download button on this page.
Practice questions
- Why do leaves swirl and trees sway in strong winds? Answer: Wind exerts force, which causes leaves to swirl and trees to sway.
- What is pressure? Answer: Pressure is the force acting on a unit area.
- Why is it easier to carry a bag with broad straps than with narrow straps? Answer: Broad straps distribute the weight over a larger area, reducing the pressure on the shoulders, making it easier to carry.
- What is the formula for pressure? Answer: Pressure = Force / Area (दाबः = बलम्् / क्षेत्रफलम््).
Frequently asked questions
What is the main topic of NCERT Class 8 Science Curiosity Chapter 6?
Chapter 6 discusses force, wind, storms, cyclones, and the concept of pressure.
How does pressure relate to force and area?
Pressure is defined as the force acting perpendicularly on a unit area of a surface.
Why are broad straps more comfortable for carrying bags?
Broad straps distribute the weight of the bag over a larger area, thus reducing the pressure on the shoulders.
What are some effects of wind mentioned in the chapter?
The chapter mentions leaves swirling and trees swaying due to wind.
What is the formula for pressure?
Pressure is calculated as Force divided by Area (दाबः = बलम्् / क्षेत्रफलम््).
What natural phenomena are hinted at in Chapter 6?
The chapter hints at understanding phenomena like storms and cyclones.
Related resources
Important topics
Topics covered
NCERT Class 8 Science — Curiosity (Sanskrit) — Chapter 6 — अध्यायः ६ प्रबलता, वायुः, झञ्झावात, चक्रवातश्च. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.