CBSE Class 4 Social Science: Chapter 19 - Roots NCERT Solutions
This chapter, 'Roots' (ज़ड़ों क़ा ज़ाल), from the CBSE Class 4 Social Science curriculum, delves into the essential role of roots in plant life. The NCERT Solutions provide clear explanations and answers to questions about why plants, like grass, are difficult to uproot, the presence and depth of roots in various plants, and how roots help plants survive. It explores how roots absorb water and nutrients, explaining why watering plants is crucial and how even large trees like Neem get water from deep within the soil. The solutions also clarify that many common vegetables are, in fact, plant roots. This chapter aims to build a foundational understanding of plant biology and the vital functions of roots, aiding students in their exam preparation by simplifying complex concepts.
Quick info
| Board | CBSE |
|---|---|
| Class | Class 4 |
| Subject | सामाजिक विज्ञान |
| Session | 2026 |
| Language | Hindi |
| Type | NCERT Solutions |
| Chapter | 19. ज़ड़ों क़ा ज़ाल |
Chapter summary
Chapter 19, 'Roots' (ज़ड़ों क़ा ज़ाल), for Class 4 Social Science, focuses on the fundamental role of plant roots. The NCERT Solutions cover why roots anchor plants firmly, the varying depths of roots in different plants, and their critical function in absorbing water and nutrients. It also addresses common misconceptions, explaining that many vegetables are roots and how plants survive without direct watering. These solutions simplify the concepts for young learners, making them easier to grasp for revision.
Learning outcomes
- Understand the importance of roots for plant stability.
- Identify different types of roots and their functions.
- Explain how roots absorb water and nutrients.
- Recognize that many vegetables are plant roots.
- Appreciate how plants survive in different conditions using their roots.
Topics covered
Paper topics
- Function of Roots
- Root Depth in Plants
- Water and Nutrient Absorption
- Root Vegetables
- Plant Survival
- Anchoring Plants
- Watering Plants
- Types of Plants (Grass, Trees, Vines)
- Plant Parts
- Root Systems
Important topics
- Role of roots in anchoring plants
- How roots absorb water and nutrients
- Identifying root vegetables
- Survival of plants in different conditions
- Comparison of root systems
PDF preview
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Questions and Solutions
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
- जमीन के अंदर गहराई में मौजूद पानी, जिसे उनकी जड़ें सोख लेती हैं।
- बारिश का पानी, जो जमीन में रिसकर उनकी जड़ों तक पहुँचता है।
Question 13
Question 14
एन.सी.ई.आर.टी. पाठ्यपुस्तक (पृष्ठ संख्या 160)
सवाल ही सवाल
आजकल तो अब्दुल के दिमाग में पौधे ही घूमते हैं। उनके बारे में अनेकों सवाल उठते हैं। स्कूल की दीवार से एक पौधा निकलते देखकर अब्दुल सोचने लगा-
Question 15
Question 16
Question 17
Question 18
Question 19
Question 20
Question 21
Question 22
- वह पौधा बीज से उगा है जो दीवार की दरार में फँस गया था।
- संभवतः पक्षियों (जैसे कौवे) या हवा ने बीज को वहाँ पहुँचाया होगा, या वह किसी पुराने पौधे से गिरकर वहाँ जम गया होगा।
Question 23
एन.सी.ई.आर.टी. पाठ्यपुस्तक (पृष्ठ संख्या 161)
अब्दुल ने देखा कि रास्ते में एक बहुत बड़ा पेड़ गिरा हुआ था। उस पेड़ की कुछ टूटी हुई जड़ें भी दिखाई दीं। उसे अपने घर का नीम का पेड़ याद आ गया।
Common mistakes
- Not understanding that roots are essential for anchoring plants.
- Confusing edible roots with other plant parts.
- Underestimating the depth and reach of plant roots.
- Not realizing that plants absorb water through their roots.
Revision tips
- Focus on the anchoring function of roots and why some plants are harder to pull out.
- Review the examples of vegetables that are roots and try to identify them.
- Understand how roots help plants get water, especially during dry periods.
- Draw diagrams of different root systems to visualize their structure and depth.
Practice MCQs
Q1. Why is a small grass plant difficult to pull out of the ground?
Explanation: Grass has roots that spread deep into the soil, providing a strong hold and making it difficult to remove.
Q2. Which of the following is a root vegetable?
Explanation: Carrots are taproots, meaning they are the primary root of the plant and are commonly eaten as a vegetable.
Q3. How do plants get essential water and nutrients?
Explanation: Roots are specialized to absorb water and dissolved nutrients from the soil, which are then transported to other parts of the plant.
Q4. Why do plants like Neem and Peepal often survive without regular watering?
Explanation: Large trees have extensive root systems that can penetrate deep into the ground, accessing underground water sources.
Q5. What happens to a broken part of a plant, like a pea vine's stem, if it loses its connection to the roots?
Explanation: When a plant part is detached from the roots, it can no longer receive the water and nutrients essential for its survival, leading to wilting and drying.
Frequently asked questions
What is the main function of roots for a plant?
The main functions of roots are to anchor the plant firmly in the soil and to absorb water and essential nutrients from the soil.
Why are some plants, like grass, hard to pull out?
Grass plants are difficult to pull out because their roots spread widely and go deep into the soil, holding the plant securely.
Are all vegetables we eat roots?
No, not all vegetables are roots. However, many common vegetables like carrots, radishes, and beets are actually the roots of their respective plants.
How do large trees get enough water?
Large trees have extensive and deep root systems that can reach underground water sources, allowing them to absorb sufficient water even without regular rainfall or watering.
What happens if a plant's roots are damaged?
If a plant's roots are damaged, it cannot absorb water and nutrients effectively, which can lead to wilting, stunted growth, and eventually, the death of the plant.
Why is it important to water plants?
Water is essential for plants as it helps in the absorption of nutrients from the soil and is crucial for various life processes within the plant. Roots absorb this water.
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