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H1: Tata DAV Class 8 Social Science (S.St) Solutions
Tata DAV Class 8 Social Science Solutions help students understand important topics from History, Civics, and Geography. These solutions provide simple explanations and step-by-step answers to help students prepare for exams and complete their homework easily.
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Chapter 1: Resource – Utilisation and Development
A. Tick (
) the correct option
- Future generations will depend on solar energy because it is—
(c) inexhaustible - Which one of the following resources can be recycled? (a) gold
- All the abiotic resources include— (b) non-living things
- Available resources which are not being tapped fully for the time being are called— (d) potential resources
- Which one does not promote conservation of resources? (c) use as much resources as required
B. Fill in the blanks
- Renewable resources can be used again and again after processing.
- On the basis of occurrence, resources are classified into two categories— biotic and abiotic
- With advancement of technology, availability of capital and skilled labour are necessary for resource utilisation.
- Developed countries are economically self-sufficient and technologically advanced.
- The potential resources need a detailed survey for estimating their quantity and quality.
C. Write the technical term (with explanation)
- Any material which is used to satisfy human needs Resource Explanation: Anything that has usefulness and helps humans fulfil their needs (like water, land, minerals) is called a resource.
- Resources which cannot be renewed Non-renewable resources Explanation: These are resources that take millions of years to form and cannot be replaced quickly, like coal and petroleum.
- Resources which are created by human beings Human-made resources Explanation: These are resources made by humans using natural resources, such as machines, roads, and buildings.
- The resources which are surveyed and developed Actual resources Explanation: These resources have been properly studied (surveyed), their quantity is known, and they are being used currently.
- Sustainable and optimum utilisation of resources Resource conservation Explanation: It means using resources carefully, avoiding wastage, and ensuring they are available for future generations.
D. Answer in brief (Detailed Explanation)
1. Utility and value of a resource vary from time to time and place to place.
Explanation:
The usefulness (utility) and importance (value) of a resource depend on location and time.
Examples:
- Water is very valuable in desert areas but less scarce in rainy regions.
- Coal was very important during the industrial revolution, but today solar energy is gaining importance.
- Land in cities is more expensive than in villages due to higher demand.
Thus, resources do not have the same value everywhere or at all times.
2. Why are human beings the most important resource?
Explanation:
Human beings are called the most important resource because:
- They use and manage natural resources.
- They have knowledge, skills, and technology.
- They create human-made resources.
- They help in development of economy and society.
Without humans, other resources cannot be utilised properly.
3. Difference between biotic and abiotic resources
Explanation:
| Biotic Resources | Abiotic Resources |
|---|---|
| Derived from living things | Derived from non-living things |
| Have life | No life |
| Example: plants, animals | Example: air, water, soil |
Biotic = Living Abiotic = Non-living
4. Need for resource planning (any 3–4 points)
Explanation:
Resource planning is necessary because:
- Resources are limited and exhaustible
- They are unevenly distributed across regions
- To avoid overuse and wastage
- To ensure availability for future generations
- To maintain environmental balance
Proper planning helps in sustainable development.
5. Six factors affecting utilisation of resources
Explanation:
The use of resources depends on:
- Technology – Better technology improves usage
- Capital – Money needed for development
- Skilled labour – Trained workers
- Demand – Need for resource
- Government policies – Rules and regulations
- Availability of resources – Presence in an area
All these factors together decide how resources are used.
E. Long Answer Questions (Detailed + Scoring Format)
1. Human needs and wants are neither uniform nor static
Explanation:
Human needs and wants are different in different places and change over time.
Examples:
- People in cold regions need woollen clothes, while people in hot regions need cotton clothes.
- Earlier, people did not use mobile phones, but today they are a basic need.
- Food habits differ from region to region.
Therefore, needs are not the same everywhere and keep changing with time.
2. Renewable vs Non-renewable resources + preference
Explanation:
| Renewable Resources | Non-renewable Resources |
|---|---|
| Can be replenished | Cannot be replenished |
| Unlimited supply | Limited supply |
| Eco-friendly | Cause pollution |
| Example: solar energy | Example: coal |
Preference:
Renewable resources should be preferred because:
- They are environment-friendly
- They do not get exhausted
- They support sustainable development
3. Sustainable development & its need
Explanation:
Sustainable development means using resources in such a way that present needs are fulfilled without harming future generations.
Need:
- Resources are limited
- Environmental problems are increasing
- To maintain ecological balance
- To ensure future availability
It is necessary for long-term survival of humans.
4. Classification of resources
Explanation:
Resources are classified on different bases:
(i) On the basis of origin:
- Biotic (living)
- Abiotic (non-living)
(ii) On the basis of exhaustibility:
- Renewable
- Non-renewable
(iii) On the basis of development:
- Actual resources (in use)
- Potential resources (not fully used yet)
(iv) On the basis of ownership:
- Individual
- Community
- National
This classification helps in better understanding and management.
| Basis | Types | Examples |
|---|---|---|
| Origin | Biotic / Abiotic | Plants, Animals / Air, Water |
| Exhaustibility | Renewable / Non-renewable | Sun, Wind / Coal, Petroleum |
| Development | Actual / Potential | Used resources / Untapped resources |
| Ownership | Individual / Community / National | House / Park / Minerals |
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