Dear students, here I am providing Exercise & Additional Questions Answers of Unit 5 Green Skills of class 9 from Employability skills book published by NCERT.
Class 9 Employability Skills Unit 5 Green Skills Exercise and Additional Questions Answers
Session 1 : Society and Environment
Check Your Progress:
A. Multiple Choice questions
Read the questions carefully and circle the letter (a), (b), (c) or (d) that best answers the questions.
1.What are some of the environmental changes caused due to modern methods of agriculture ?
(a) Chemical Pollution due to fertilisers
(b) Improvement in the environment
(c) Lower air pollution due to crops.
(d) Decrease in forest areas.
Ans: Chemical Pollution due to fertilisers.
2. How can we conserve our health and environment ?
(choose all the correct options)
(a) Grow organic crops
(b) Use natural fertilisers
(c) Manage waste water
(d) Use more air conditioning.
Ans: (a) Grow organic crops and (b) Use natural fertilisers.
3. A Steel factory burns firewood and charcoal for heating and melting the steel ? What are the possible effects on the environment ? (Choose all the correct options )
(a) Increase in global temperature
(b) Decrease in global temperature
(c) Increase in air pollution
(d) Decrease in air pollution
Ans:(c) Increase in air pollution.
Class 9 Employability Skills Unit 5 Green Skills Exercise and Additional Questions Answers
B. Short answer questions :
- What are the five sources of energy available to us ? Give two examples of each.
Ans: Five sources of energy are given below –
(i) Sun
Examples : Solar energy, Electricity
(ii) Wind
Examples: Wind energy, electricity
(iii) Water
Examples: Hydropower, Electricity
(iv) Coal
Examples: Light, Electricity
(v) Biomass
Examples: Electricity, Heat.
2. What are the sources of pollution ?
Ans: Following are the sources of pollution-
i. Harmful pesticides and fertilisers.
ii. Throwing waste in water
iii. Burning of fuels
iv. Smoke from factories.
v. Release of waste water from house, farms and factories.
vi. Burning waste and remains of crops.
3. Classify the following under the three respective categories of natural resources.
Air, Iron, sand, petroleum, wind, clay, fish, forest, gold, pearls.
Ans:
| Inexhaustible | Renewable | Non- renewable |
| Iron, fish, gold, pearls | Air, wind, forest | sand, petroleum, clay, |
Class 9 Employability Skills Unit 5 Green Skills Exercise and Additional Questions Answers
Additional Questions Answers:
Q.1. Mention the categories of Natural Resources.
Ans: i. Exhaustible Resources.
ii. Inexhaustible Resources.
iii. Renewable Resources.
iv. Non-renewable Resources.
Q.2. Define exhaustible Resources. Write two examples.
Ans: The resources which are available in limited quantities and are going to be exhausted as a result of continuous use are called Exhaustible Resources.
Example: Coal, Petroleum.
Q.3. Define inexhaustible Resources. Write two examples.
Ans: The resources which cannot be exhausted by human consumption are called inexhaustible resources.
Q.4. Define Renewable Resources. Write two examples.
Ans: The resources which are constantly available or can be reasonably replaced or recovered are called renewable resources.
Example: Water, Wind.
Q.5. Define Non- renewable resources. Write two examples.
Ans: The resources which cannot easily be replaced once they are destroyed are called non- renewable resources.
Q.6. Mention any three activities which are damaging our Earth and environment.
Ans: i. Mining
ii. Deforestation
iii. Pollution
Q.7. Mention the types of pollutants. Write examples of each.
Ans: There are two types of pollutants
i. Pollutants that can decompose . Examples: vegetable waste, cattle dung, agricultural waste.
ii. Pollutants that cannot decompose. Examples: Plastics, insecticides, pesticides.
Q.8. Mention any three factors responsible for polluting the environment.
Ans: i. Excessive use of chemicals in agriculture.
ii. Plastic waste like bottles, bags etc. thrown on land, river pollutes the water.
iii. Dangerous gases released into the air.
Q.9. What is called greenhouse effect ?
Ans: The earth is becoming hotter because of burning fossil fuels (coal, petrol, diesel etc.). These gases trap and prevent the earth’s heat from escaping leading to a Global warming. This is called the greenhouse effect.
Q.10. Mention any three green house gases.
Ans: Carbon dioxide, Methane, Nitrous Oxide.
Q.11. Mention three Rs which you can apply for saving the environment.
Ans: The three Rs are Reduce, Reuse and Recycle.
Class 9 Employability Skills Unit 5 Green Skills Exercise and Additional Questions Answers
Session 2 : Conserving Natural Resources
Check Your Progress
A. Multiple Choice Questions
Read the questions carefully and circle the letter (a), (b), (c) or (d) that best answers the question.
- What does conservation of energy mean ? (Choose all options that apply)
(a) Saving energy
(b) Producing energy
(c) Using energy efficiently
(d) Creating energy sources
Ans: (a) Saving energy and (c) using energy efficiently
2. Which of the following are non- renewable resources ?
(Choose all options that apply)
(a) Coal
(b) Diesel
(c) Sun
(d) Water
Ans: (a) Coal and (b) Diesel
3. Which of the following is an example of renewable resources ?
(a) Coal
(b) Solar Energy
(c) CNG
(d) Petroleum
Ans: (b) Solar Energy
B. Short answer questions
- Write any three actions which you can take to conserve energy .
Ans: The three actions which we can take to conserve energy are as follows-
i. We should switch off lights, fans, TV and other electrical items when we are not using them.
ii. We should use Pressure cooker to save energy required for cooking.
iii. Electric items such as Air conditioners, geysers, heaters etc. consumes a lot of electricity so we
should use them when necessary.
2. Describe any three methods of Water conservation.
Ans: Three methods of Water conservation are as follows –
i. We should grow vegetation in the catchment areas.
ii. Dams and Reservoirs should be constructed to regulate supply of water to the fields as well as to
enable generation of hydroelectricity.
iii. We should use water judiciously in our day to day life.
3. What is the purpose of soil conservation ?
Ans: The purpose of soil conservation are as follows –
i. To maintain soil fertility.
ii. To have control on grazing.
iii. To adopt Reforestation.
4. State any three ways by which we can save energy .
Ans: Following are the ways by which we can save energy –
i. We should switch off lights, fans, TV and other electrical items when they are not in use.
ii. we should use Pressure cooker to save energy required for cooking.
iii. We should cover vessels with lids during cooking to save energy.
Class 9 Employability Skills Unit 5 Green Skills Exercise and Additional Questions Answers
Additional Questions Answers
Q.1. What do you mean by soil conservation ? How is it useful ?
Ans: Soil conservation means checking soil erosion and improving soil fertility by adopting various methods.
Soil conservation can be useful for the following reasons-
i. Maintenance of soil fertility.
ii. Control on grazing.
iii. Reforestation.
Q.2. What do you mean Forest conservation ?
Ans: Forest conservation means the retention of existing forest or the creation of new forest at the levels prescribed by the State or local authority.
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Class 9 Employability Skills Unit 5 Green Skills Exercise and Additional Questions Answers
Session 3 : Sustainable Development and Green Economy
Check your Progress
A. Multiple Choice Question
Read the question carefully and circle the letter (a), (b), (c) or (d) that best answers the question.
- Which of the following options describe a green economy correctly ? A green economy _____________
(a) uses less resources.
(b) uses more resources
(c) wastes less items
(d) wastes more items
Ans: uses less resources.
B. Short answer questions
- What are green skills ?
Ans: The skills used for promoting green economy are called green skills. Green skills contribute to preserving or restoring environmental quality for sustainable future.
2. Give two examples of green skills that you can start learning from now.
Ans: Two green skills that we can start learning from now onwards are-
i. Waste Management knowledge
ii. Water Conservation Techniques.
Additional Questions Answers
Q.1. What do you mean by sustainable development ?
Ans: Sustainable development is the development that satisfies the needs of the present without compromising the capacity of future generations, guaranteeing the balance between economic growth, care for the environment and social well being.
Sustainable development includes the following-
i. reducing excessive use of resources and enhancing resource conservation.
ii. recycling and reuse of waste materials.
Q.2. What are Sustainable Development Goals (SDGs) ?
Ans: Sustainable Development Goals known as the Global Goals are a universal call to action to end poverty, protect the planet and ensure that all people enjoy peace and prosperity.
Q.3. Which organization launched the concept Sustainable Development Goals (SDGs) ?
Ans: United Nations (UN)
Q.4. Where and in which year SDGs were launched ?
Ans: SDGs were launched at UNs Sustainable Development Summit in New York in September 2015.
Q.5. Where Green economy was first coined ?
Ans: Green economy was first coined in a 1989 report for the Government of the United KIngdom.
Q.6. What do you mean by Green economy ? Mention any five components of Green economy.
Ans: Green economy is a system which helps in economic growth while at the same time taking care of the environment.
Components of Green economy are as follows-
i. Renewable energy.
ii. Water management.
iii. Waste management.
iv. Land management.
v. Green building.
Q.7. What do you mean by green jobs ? Mention any three factors which have the potential for green jobs.
Ans: A green job is employment in any industry that contributes to reserving or restoring environmental quality in that sector and allowing for sustainable development. It includes jobs that help protect ecosystems and biodiversity and reduce energy.
The factors which have the potential for green jobs are as follows-
i. Agriculture.
ii. Construction.
iii. Forestry
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