These We and Our World Class 4 DAV Solutions and DAV Class 4 SST Chapter 6 Question Answer – Waste Management are thoughtfully prepared by experienced teachers.
DAV Class 4 SST Chapter 6 Question Answer – Waste Management
DAV Class 4 SST Ch 6 Question Answer – Waste Management
Something To Know
A. Tick (✓) the correct option:
Question 1.
Animal and plant waste can be burnt in a furnace to produce –
(a) Biogas
(b) LPG
(c) Natural Gas
Answer:
(a) Biogas
Question 2.
It is the duty of to keep our surroundings clean and green.
(a) The government
(b) Citizens
(c) The people and government-both
Answer:
(c) The people and government-both
Question 3.
It is easy to recycle –
(a) Plastic
(b) Fruits and vegetable peels
(c) Both
Answer:
(c) Both
Question 4.
Construction waste can be used for –
(a) Filling ditches
(b) Building walls
(c) Making pots
Answer:
(a) Filling ditches
B. Fill in the blanks:
Help Box:
environment, soil, compost, clean, rethink
1. Human waste in open fields must be covered with …………… in rural areas.
2. Recycling is beneficial for the ……………..
3. Biodegradable waste can be used to make …………….
4. Waste disposal is important to keep our surroundings ………………
5. The four Rs to reduce waste are reduce, reuse, recycle and ……………….
Answer:
1.soil
2. environment
3. compost
4. clean
5. rethink
C. Match the following:
| 1. Biodegradable | (a) cannot be easily waste |
| 2. Non-biodegrad-able waste | (b) can be converted into harmless substances. |
| 3. All living beings | (c) animals and humans both |
| 4. Recycling will | (d) produce waste, benefit |
Answer:
| 1. Biodegradable | (b) can be converted into harmless substances. |
| 2. Non-biodegrad-able waste | (a) cannot be easily waste |
| 3. All living beings | (d) produce waste, benefit |
| 4. Recycling will | (c) animals and humans both |
D. Answer the following questions:
Question 1.
What is waste? Name three diseases caused by waste materials thrown in open areas.
Answer:
Wastes are materials no longer needed and therefore thrown away. Three diseases caused by waste materials thrown in open areas-dysentery, typhoid and cholera.
Question 2.
Highlight two differences between biodegradable and non-biodegradable waste.
Answer:
Biodegradable waste
- They can be converted into harmless substances.
- They cannot be converted into harmless substances.
Non-biodegradable waste
- They do not damage the environment.
- They damage the environment to a great extent.
Question 3.
What are benefits of recycling?
Answer:
Recycling protects the environment. It is beneficial in the following ways:
- It reduces the amount of waste.
- It conserves our natural resources like timber, water, iron, etc.
- It reduces pollution.
- It saves energy.
Question 4.
Mention any two methods of waste disposal. Which one is the best in your opinion? Give one reason.
Answer:
Two methods of waste disposal are –
- Recycling: There are several items such as paper, iron, copper, aluminum, plastic and glass that can be recycled and made into useful items.
- Making Compost: Biodegradable wastes like dry leaves, vegetable and fruit peels, egg shells, papers, and leftover food items can be converted into harmless substances by dumping them in a pit. The pit is covered with soil and converted into compost. It can be used as manure. Besides,this will reduce the amount of garbage. In my opinion, recycling is the best method of waste disposal because it protects the environment by reducing the amount of waste.
Question 5.
Suggest two ways of reusing waste materials from our homes, schools and offices.
Answer:
Two ways of reusing waste materials from houses, schools and offices are –
- Making compost with the help of biodegradable wastes like dry leaves, vegetable and fruit peels, etc. Needless to say that compost is a good manure which helps in the growth of plants.
- Animal and plant wastes can be burnt in a furnace to produce biogas that is used as a domestic fuel.
E. Complete the Waste Management puzzle with the help of clues given.
Clues Across (→)
1. To use something again.
3. To give away something to someone.
4. Something useless.
Down (↓)
2. Converting a useless article to a useful one.
5. A bag can be used again.
6. A bucket can be recycled.
Answer:
Value-Based Question
A.R. Rehman has become famous all over the world for his contribution to music, What would be your contribution if you are made an incharge of waste management in your school?
Answer:
I will take the following steps if I am made an incharge of waste management in my school –
- There will be a dustbin with lid in each and every class.
- A few big dustbins will be kept at certain distances in the school premises,
- The gardener will be instructed to collect the dry leaves and then dump them in a pit.
Something To Do
Question 1.
List down any four items thrown away as garbage in your house everyday.
Answer:
- Fruit and vegetable peels
- Leftover food items
- Egg-shells
- Papers
Question 2.
Can you reduce the waste that your family creates everyday? How?
Answer:
Yes, I can reduce the waste created by my family everyday. I will make a deep pit in my backyard and dump all the biodegradable wastes like fruit and vegetable peels, egg shells, papers and leftover food items in it. I will cover the pit with soil when it gets filled. I will repeat the same method.
Question 3.
Do you sell any waste materials to the kabariwala (trash dealer)? Find out. How much does he pay for—
(a) One kilogram newspaper? ………………
(b) One kilogram plastic goods? …………….
Answer:
Do yourself.
Question 4.
Log on to the Internet and find out about any inspiring individual/ organisations working in India/abroad on recycling/waste management for saving the environment like NDTV News Channel has taken the project ‘Save Our Tigers’.
Answer:
Do yourself.
Question 5.
Where do you throw your household garbage? Do you reuse waste materials? How? Who takes away the garbage from your home? Where does he/she throw it? .
Answer:
We collect our household garbage in the dustbin. A sweeper comes everyday. He takes away the garbage in a cart. He throws it at some distance in the open space from where it is loaded in garbage trucks and taken to landfills for its final disposal.
Question 6.
Start a club in your school that encourages and trains students in environmental protection in the school, at home and in the neighbourhood.
(a) Save paper by collecting waste papers from classes, corridors, question- papers, circulars, etc. This paper can be reused or recycled.
(b) Start a compost pit in your school, neighbourhood or home.
(c) Prepare a project for water-harvesting system in your school or neighbourhood with the help of your parents and teachers.
(d) Start an initiative to share, special tools and seldom used household appliances among neighbours. ;
Answer:
Do yourself.
Question 7.
Project – Save Environment.
Cover the following points –
(a) Encourage your family to use public transport, walk or ride bicycles rather than using the car over short distances.
(b) Save energy by turning off lights, radio and television, when not in use.
(c) Turn off the tap while brushing your teeth.
(d) Make use of bucket instead of shower while having a bath.
(e) Use a cloth bag and refuse polythene bags.
(f) Donate your old story and textbooks, toys and games to school, daycare, or nearby hospital.
Answer:
Prepare the project with the; help of your parents and teachers.
DAV Class 4 Social Studies Chapter 6 Question Answer – Waste Management
Multiple Choice Questions (Mcqs)
A. Tick (✓) the correct option:
Question 1.
The waste material mainly consists of –
(a) papers
(b) vegetable and fruit peels
(c) both
Answer:
(c) both
Question 2.
The landfills require
(a) place
(b) waste
(c) manure
Answer:
(a) place
Question 3.
Garbage trucks carry wastes to
(a) open space
(b) landfills
(c) park
Answer:
(b) landfills
Question 4.
Paper can be recycled to make
(a) newspaper
(b) toilet paper
(c) both
Answer:
(c) both
II. Fill In The Blanks
1. The amount of garbage is increasing due to increase in , Industries and packaging. ;
2. By dumping biodegradable wastes we can reduce the of garbage.
3. Human and animal waste can be covered with in rural areas.
4. Most of the non-biodegradable waste is
5. We should carry a bag in palce of plastic bag.
Answer:
1. population
2. amount
3. soil
4. recyclable
5. cloth
III. True/False
1. We should use energy-efficient light bulbs.
2. Biodegradable wastes cannot be converted into harmless substances.
3. We can throw waste materials on the streets.
4. Burning of waste pollutes the air and harms the surroundings.
5. We must take care not to litter, spit or urinate in open spaces.
Answer:
1. True
2. False
3. False
4. True
5. True
IV. Match The Following
| Column ‘A’ | Column ‘B’ |
| 1. Biodegradable | (i) domestic fuel items |
| 2. Biogas plants | (ii) popular in Japan |
| 3. Burning the trash | (iii) an organisation for waste management |
| 4. Kabaad seJugaad | (iv) compost |
Answer:
| Column ‘A’ | Column ‘B’ |
| 1. Biodegradable | (iv) compost |
| 2. Biogas plants | (i) domestic fuel items |
| 3. Burning the trash | (ii) popular in Japan |
| 4. Kabaad seJugaad | (iii) an organisation for waste management |
V. Name The Following
1. The wastes that can be converted into harmless substances.
2. The wastes that cannot be converted into harmless substances
3. Name an organisation that makes and trains people in creating useful and beautiful items from waste materials.
Answer:
1. Biodegradable
2. Non-biodegradable
3. Kabaad se Jugaad
VI. Jumbled Words
1. eryclcing ………………………
2. virenonmnt ………………………
3. llpoutoin ………………………
4. mpcosto ………………………
5. spltiac ………………………
Answer:
1. recycling
2. environment
3. pollution
4. compost
5. plastic
VII. Cross The Odd One
1. vegetable; dysentery; typhoid; cholera
2. nails; glass; papers; rubber
3. schools; environment; offices; factories
4. timber; water; house; iron
Answer:
1. vegetable
2. papers
3. environment
4. house
VIII. Short Answer Type Questions
Question 1.
What does the waste materials consist of?
Answer:
The waste materials consist of papers, broken glass, metal or plastic goods, vegetable and fruit peels and leftover food.
Question 2.
Name the animals that produce waste around us.
Answer:
Such animals are-cows, buffaloes, horses, camels and dogs.
Question 3.
How has the garbage become a hazard for humans, animals and the environment?
Answer:
The garbage badly affects the quality of air, water and land. It becomes a breeding ground for germs, mosquitoes, flies, and rats that cause diseases like dysentery, cholera, typhoid, etc. It also causes foul smell.
Question 4.
What is waste management?
Answer:
Waste management is the way in which we find methods to dispose off waste materials.
IX. Long Answer Type Questions
Question 1.
Enlist the reasons that cause a steady increase in the amount of garbage.
Answer:
- The reasons that cause an increase in the amount of garbage are –
- Increase in population
- Increase in industries
- Widespread use of polythene bags and packaging.
Question 2.
How can animal and plant waste be managed?
- Animal and plant waste can be burnt in a furnace to produce biogas that is used as a domestic fuel.
- Human and animal waste can be covered with soil in rural areas.
- In cities, the toilet waste must be washed down the drains and then to the sewage system, where the solid waste is separated and the water is purified.
Question 3.
Mention five methods of reducing waste.
Answer:
- Carry a cloth bag in place of plastic bag.
- Compost biodegradable material.
- Use energy-efficient light bulbs.
- Fill ditches with construction waste.
- Create useful items from household wastes.
DAV Class 4 SST Chapter 6 Notes – Waste Management
- Waste management is not an easy affair. Every day thousands of tonnes of waste is thrown out from our households, offices, factories, etc.
- The waste material mainly consists of papers, broken glass, metal or plastic goods, vegetable and fruit peels and leftover food.
- The amount of garbage is increasing day by day due to various reasons. This garbage affects the quality of air, water and land. It also causes several diseases.
- Waste materials are of two types-biodegradable wastes and non-biodegradable wastes. Biodegradable wastes such as dry leaves, papers etc. can be converted into harmless substances by dumping them in a pit. But non-biodegradable wastes such as nails, polythene bags, etc. cannot be converted into harmless substances.
- Some waste materials such as plastic, glass, paper are recyclable. Recycling protects the environment in many ways.
- There are different ways of disposing of waste-landfills, burning the trash, recycling and making compost. Since these methods are costly, it is desired from every citizen that he/she tries his/her best in reducing the amount of garbage.
- It is our duty to remove waste heaps. People must be encouraged to construct toilets in rural areas. In urban areas more toilets must be made.
- Our country produces about 0.2 to 0.6 kg of garbage per head, per day. Garbage from houses are collected by sweepers. The dustbins at roadsides are emptied into garbage trucks and taken to landfills.
- Garbage: Waste material.
- Biodegradable: A substance or chemical that can be changed to a harmless natural state by the action of bacteria and will therefore not damage the environment.
- Non-biodegradable: A substance or chemical that cannot be changed to a harmless natural state by the action of bacteria and may therefore damage the environment.
- Recycling: Separating usable materials from the waste and converting them into new products.
- Landfill: An area of land where large amounts of waste material are buried under the earth.
- Trash: Things that are thrown away because they are no longer useful.
- Compost: A mixture of decayed plants, food, etc. that can be added to soil to help plants grow.