CBSE-SOLUTIONS
CLASS-10
PART-A
UNIT-V GREEN SKILLS-II
1. ________ is caused when natural or man-made disturbance disrupts the natural balance of an ecosystem.
(a) Damage
(b) Ecological imbalance
(c) Natural disaster
(d) Pollution
Answer: (b) Ecological imbalance
2. The primary objective of sustainable development is:
(a) Economic growth
(b) Environmental protection
(c) Social inclusion
(d) All of the above
Answer: (d) All of the above
3. Problem related to sustainable development is:
(a) Lack of proper implementation of policies.
(b) Lack of financial resources.
(c) Conflict between immediate profit and investment towards sustainable technologies.
(d) All of the above
Answer: (d) All of the above
4. Almost ________ of the earth is made up of water.
(a) 30%
(b) 3%
(c) 70%
(d) 2.5%
Answer: (c) 70%
5. A Green Economy is one which is:
(a) Low carbon
(b) Socially inclusive
(c) Both (a) and (b)
(d) Neither (a) nor (b)
Answer: (c) Both (a) and (b)
6. According to the concept of sustainable development, the environment and development are ________ issues.
(a) Inseparable
(b) Separate
(c) Independent
(d) None of the above
Answer: (a) Inseparable
7. How many sustainable development goals are given by the United Nations?
(a) 18
(b) 17
(c) 15
(d) 20
Answer: (b) 17
8. Choose the option which defines sustainable development.
(a) Taking care of future generations
(b) Taking care of only ourselves
(c) Taking care of ourselves and the future generations
(d) Well-being of all
Answer: (c) Taking care of ourselves and the future generations
9. Which organisation has made the Sustainable Development Goals?
(a) United Nations
(b) League of Nations
(c) UNICEF
(d) World Health Organisation
Answer: (a) United Nations
B. State 'T' for True or 'F' for False
1. The ability to provide adequate food and nutrition is a challenge faced by many countries.
Answer: T
2. Urbanization has been contributing to environmental degradation.
Answer: T
3. A green economy reduces environmental risks but does not enable social equity.
Answer: F
4. Non-renewable energy is energy that comes from sources that are naturally replenished.
Answer: F
5. The Sustainable Development Goals are included in a UN Resolution called the 2030 Agenda.
Answer: T
C. Answer the following Questions
1. What is the meaning of sustainable development?
Answer: Sustainable development is the development that meets the needs of the present without compromising the ability of future generations to meet their own needs. It balances economic growth, environmental protection, and social inclusion.
2. Name and explain four ecological disruptions that are man-made.
Answer:
Deforestation: Large-scale cutting of forests for agriculture, logging, or urbanization, leading to loss of biodiversity, soil erosion, and climate change.
Pollution (air, water, soil): Release of harmful chemicals and waste from industries and vehicles, damaging ecosystems and health.
Over-exploitation of resources: Excessive mining, fishing, or groundwater extraction that depletes natural resources faster than they can regenerate.
Urbanization and habitat destruction: Expansion of cities and infrastructure that fragments habitats and displaces wildlife.
3. What is e-waste? Why has it assumed importance in recent years?
Answer: E-waste refers to discarded electrical and electronic equipment such as mobiles, computers, TVs, and batteries. It has gained importance due to rapid technological advancement, short product lifecycles, and the presence of toxic materials (like lead, mercury, cadmium) that can harm the environment and human health if not disposed of properly.
4. What are the four Rs of waste management?
Answer:
Reduce – Minimize waste generation.
Reuse – Use items multiple times.
Recycle – Process waste into new products.
Recover – Extract energy or materials from waste.
5. Name any two ways to conserve each of the following: 1. Air, 2. Water, 3. Land, 4. Energy
(i) Air
Plant more trees and avoid burning waste.
Use public transport/carpooling and reduce use of polluting vehicles.
(ii) Water
Rainwater harvesting and fixing leaks.
Use water-efficient appliances and avoid wastage.
(iii) Land
Practice afforestation and prevent soil erosion.
Promote organic farming and reduce use of chemical fertilizers.
(iv) Energy
Use energy-efficient appliances (LEDs, 5-star ratings).
Promote renewable sources like solar and wind energy.
6. List any four factors causing ecological imbalance.
Answer:
Overpopulation and increased resource consumption.
Industrialization and pollution.
Deforestation and loss of biodiversity.
Climate change and unsustainable agricultural practices.
7. List some ways in which we can use resources sensibly.
Answer:
Adopt the 4 Rs (Reduce, Reuse, Recycle, Recover).
- Use renewable sources of energy.
- Practice water and energy conservation.
- Support green technologies and sustainable agriculture.
- Promote awareness and follow eco-friendly lifestyles.
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