Environment and its Conservation Unit 7 Science Notes of Class 5. Under category ‘Science and Environment Education’ of Class 5 Science subject Unit:7 – “Environment and its Conservation”, Students and teachers can find the notes and solutions of fill in the blanks, true and false statements, definitions, match the followings, definitions, question answers, make meaningful words, glossary and extra word meanings in Nepali language.
1. Fill in the blanks with correct words.
a. Environment includes living things and non-living things around us.
b. Human activities disturb the balance in the environmental and cause different problems.
c. Smokeless energy sources like wind energy, hydroelectricity, solar energy should be used.
d. If we kill snakes, then the number of frogs and mice increase and they disturb the balance of the environment.
e. The process of planting tree saplings on the empty spaces and barren land is called afforestation.
f. Terracing can be done in less sloppy areas for agriculture.
g. Non-degraded wastes must be recycled into other objects.
2. Write ‘T’ for true and ‘F’ for false statement.
a. Industries provide clean air to us. F
b. Terracing can be done in some less sloppy lands. T
c. The places where we can find water are called sources of water. T
d. Draining waste water into water resources also helps to conserve water resources. F
e. Forest fire destroys all the forest and wildlife in no time. T
f. Afforestation means planting tree saplings. T
g. Plantation of forest along river banks is very expensive way for controlling flood. F
3. Select the correct alternatives.
a. Industries emit smoke containing harmful gases and dust particles. (Hospitals/Industries/Household)
b. When animals die, micro-organisms decay them and give nutrients to the soil. (birds/animals/micro-organisms)
c. If living and non-living things are not conserved properly, the environment becomes imbalanced. (forests/environment/water)
d. Embankments along river bank helps to prevent and control floods. (Agriculture/settlements/Embankments)
e. The process of changing village areas or rural areas into towns is called urbanization. (industrialization/urbanization/afforestation)
f. Forest fire destroys plants and animals living in the forest. (protects/conserves/destroys)
4. Match the followings.
|Forest fire||Sloping surface|
|Embankment||Destroys wild life|
|Forest fire||Destroys wild life|
|Terrace farming||Sloping surface|
5. Define the following terms.
a. Industrialization – The development of industries on an extensive scale is called industrialization.
#What do you mean by Industrialization?
b. Afforestation – The process of planting tree saplings on an empty spaces and uncultivatable land is called afforestation.
#What do you mean by Afforestation?
c. Water sources – The places where we can find water are called water sources or sources of water.
#What do you mean by Water Sources?
d. Embankments – A wall which is made by stone along the beach of river to prevent floods is called embankments.
#What do you mean by Embankments?
6. Answer the following questions.
a. How can we conserve environment? Mention five ways.
Answer: The five ways of conserving environment are as follows-
i. Reducing emission of smoke and harmful gases.
ii. Conservation of forest.
iii. Protection of wild life.
v. Conservation of water sources.
b. Why do we need to stop setting forest fire?
Answer: We need to stop setting forest fire to conserve plants and wild animals.
c. What are the effects of unplanned urbanization? Explain.
Answer: The effects of unplanned urbanization are listed below in points-
i. Loss of natural beauty.
ii. Imbalance in ecosystem.
iii. Causes different disaster like soil erosion, landslides, etc.
iv. Disturbs human settlement areas due to pollution.
d. What are the benefits of afforestation? Write any two.
Answer: The two benefits of afforestation are as follows-
i. Afforestation prevents floods, landslides, soil erosion, etc.
ii. It protects water sources from drying up.
e. Why do we need embankments?
Answer: We need embankments to control and prevent floods.
f. Write two proper practices of farming on sloppy land.
Answer: The two proper practices of farming on sloppy land are terraces farming and contour farming.
g. How can we manage solid waste? Explain.
Answer: We can manage solid waste by following ways-
i. Decayed and non-decayed wastes should be called separately.
ii. Dead animals must be disposed of inside the earth surface.
iii. We can reuse the unused materials.
Relocated – placing in a new place. (#relocated meaning in Nepali language is पुनर्स्थापित.)
Randomly – haphazardly. (#randomly meaning in Nepali language is
Embankment – structures protecting the bank. (#embankment meaning in Nepali language is तटबन्ध.)
Responsibility – duty. (#responsibility in Nepali language is जिम्मेवारी.)
Banned – not allowed. (#banned meaning in Nepali language is रोक लगाउनु, निषेध गर्नु, प्रतिबन्धित.)
Infertile – not fertile. (#infertile meaning in Nepali language is बाँझो.)
Disturb – to interrupt, to interfere. (#disturb meaning in Nepali language is खलबलाउनु, गडबड.)
Balance – (#balance meaning in Nepali language is सन्तुलन.)
Afforestation – planting tree saplings. (#afforestation meaning in Nepali language is वनीकरण.)
Terracing – to build narrow strips of land on a slope so that people can plant crops there (#terracing meaning in Nepali language is .)
Smokeless – producing or emitting little or no smoke. (#smokeless meaning in Nepali language is धुवाँ रहित, धुवाँ बिना.)
Environment – the surroundings in which a person, animal, or plant lives. (#environment meaning in Nepali language is वातावरण.)
Hydroelectricity – producing electricity by the force of fast moving water such as rivers or waterfalls. (#hydroelectricity meaning in Nepali language is जलविद्युत.)
Increase – a rise in the size, amount,etc. (#increase meaning in Nepali language is वृद्धि, बढ्नु.)
Saplings – a young plant or tree. (#saplings meaning in Nepali language is बिरुवाहरू.)
Barren – (of land) too poor to produce much or any vegetation. (#barren meaning in Nepali language is बाँझो.)
Recycle – convert (waste) into reusable material. (#recycle meaning in Nepali language is फेरि प्रयोगमा ल्याउनु.)
Drainage – (drainage meaning in Nepali language is कुलो, नाली, जल प्रणाली.)
Conserve – to protect. (#conserve meaning in Nepali language is संरक्षण.)
Destroy – end the existence of (something) by damaging or attacking it. (#destroy meaning in Nepali language is नष्ट, नाश गर्नु.)
Wildlife – animals that live in the forest, jungle. (#wildlife meaning in Nepali language is वन्य, वन्यजन्तु, वन्यजन्तुका, वन्य जीवन.)
Plantation – sually large group of plants and especially trees under cultivation. (#plantation meaning in Nepali language is वृक्षारोपण.)
Expensive – costing a lot of money. (#expensive meaning in Nepali language is महँगो.)
Emit – produce and discharge (something, especially gas or radiation). (#emit meaning in Nepali language is उत्सर्जन गर्नुहोस्.)
Harmful – causing or likely to cause harm. (#harmful meaning in Nepali language is हानिकारक, हानि गर्ने.)
Nutrients – any substance that plants or animals need in order to live and grow. (#nutrient meaning in Nepali language is पोषण.)
Properly – correctly or satisfactorily. (#properly meaning in Nepali language is ठिकसँग.)
Settlement – a place, typically one which has previously been uninhabited, where people establish a community. (#settlement meaning in Nepali language is उपनिवेश. )
Rural – Remote. (#rural meaning in Nepali language is ग्रामीण, गाउंको.)
Prevent – stop or keep (something) from happening. (#prevent meaning in Nepali language is रोक्नु.)
Town – populated area with fixed boundaries and a local government. (#town meaning in Nepali language is शहर, नगर.)
Process – a series of actions or steps taken in order to achieve a particular end. (#process meaning in Nepali language is प्रक्रिया, कार्यवाही गर्नु.)
Spring – Water fall. (#spring meaning in Nepali language is छहरा.)
Benefits – an advantage or profit gained from something. (#benefits meaning in Nepali language is लाभहरू, फाइदाहरू.)
Manage – be in charge of (a business, organization, or undertaking); run. (#manage meaning in Nepali language is प्रबन्ध गर्नु.)
Contour – an outline representing or bounding the shape or form of something. (#contour meaning in Nepali language is रुपरेखा, आकृति.)
Various – different from one another; of different kinds or sorts. (#various meaning in Nepali language is बिभिन्न, विविध.)
#From above notes of “Environment and its conservation Unit-7 Science Notes Class 5, we hope students can explain the importance of various components of the environment and able to know how to conserve the environment. Also they can learn about afforestation, urbanization, proper farming practices and preventing pollution – such as reducing emission of smokes and harmful gases.