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Ch 13 sound (science) keywords

 Ch–13 Light Keywords / Homework Incident Ray: The light ray which strikes any surface is called the incident ray. Reflected Ray: The ray that comes back from the surface after reflection is known as the reflected ray. Normal: A line making an angle of 90° to the line representing the mirror at the point where the incident ray strikes the mirror. This line is known as the normal to the reflecting surface. Angle of Incidence: The angle between the normal and the incident ray is called the angle of incidence. Angle of Reflection: The angle between the normal and the reflected ray is known as the angle of reflection. Lateral Inversion: In the image formed by a mirror, the left of the object appears on the right and the right appears on the left. This is known as lateral inversion. Diffused or Irregular Reflection: When all the parallel rays reflected from a rough or irregular surface are not parallel, the reflection is known as diffused or irregular reflection. Regular Reflection: Ref...

Class 8 synonym english

Synonyms  Absolute – complete Adequate – sufficient Affectionate – loving Announce – declare Abandon – leave Accomplish – achieve Assemble – gather Blend – mix Coarse – rough Conceal – hide Comprehend – understand Die – perish Decide – determine Distinct – clear Dispute – quarrel Enough – sufficient Eager – keen Exceed – surpass Excuse – pardon Feeble – weak Futile – useless Frighten – terrify Hinder – obstruct Join – unite Just – fair Joy – pleasure Liberty – freedom Lonely – solitary Labour – toil Lofty – high Loyal – faithful Miraculously – wonderfully

Paryayvachi Shabd Hindi class 8

  पर्यायवाची शब्द पृथ्वी - धरती, भूतल, धरा पथिक - यात्री, यात्रीका, रही फूल - कुसुम, पुष्प, सुमन बसंत - वसंत, ऋतुराज, कुसुमाकर बाण - तीर, शर, सायक जल - पानी, नीर, अम्बु, वारि अग्नि - आग, पावक, अनल, वह्नि वर्षा - वर्षा, वर्षण, मेघ, पर्जन्य चन्द्र - शशि, सोम, सुधाकर सूर्य - आदित्य, रवि, भानु नदी - सरिता, तटिनी, सरस्वती मृत्यु - मरण, निधन, देहांत और - अन्य, दूसरा, भिन्न मनुष्य - मानव, नर, इंसान यश - कीर्ति, प्रसिद्धि, ख्याति युद्ध - रण, संग्राम, लड़ाई रात्रि - निशा, रजनी, यामिनी इंद्र - देवराज, सुरेश, पुरंदर लक्ष्मी - श्री, समृद्धि, संपदा वन - अरण्य, कानन, निकुंज वायु - पवन, समीर, अनिल शत्रु - दुश्मन, रिपु, अरि शोभा - सुंदरता, छटा, लावण्य समुद्र - सागर, उदधि, रत्नाकर स्वर्ण - सोना, कनक, हेम सुंदर - मनोहर, लावण्य, रमणीय

SST geography chapter 4 industries question answer class 8

 Industries Q1. What is meant by the term industry? Ans: Industry refers to an economic activity that is concerned with production of goods, extraction of minerals or the provision of services. Q2. Which are the main factors which influence the location of an industry? Ans: The factors affecting the location of industries are the availability of raw material, land, water, labour, power, capital, transport and market. Q3. Which industry is often referred to as the backbone of modern industry and why? Ans: Steel is often called the backbone of modern industry. Almost everything we use in our daily life is either made of iron or steel or has been made with tools and machinery of these metals. Ships, trains, trucks and cars are made largely of steel. Q4. Agro-based and mineral-based industry. Agro-based industry: Agro-based industries use plant and animal-based products as their raw material. Food processing, vegetable oil, cotton textile, dairy products and leather industries are exam...

English grammar structure of sentence class 8

 Ch–15 Structure of a Sentence Subject: The subject is always a word or a group of words that does the work of a noun. Ex. – The boys are idle. The directorate flutters in the sunshine. Enlargement of the Subject: The subject if qualified by an adjective or a word used as a group of words that does the work of an adjective, it is called its enlargement or attribute. Ex. – India’s progress is rapid. Girls of good character are respected. Extension of the Predicate: The subject if qualified by an adjective or a word used as a group of words, doing the work of an adverb, in the same way the verb in the predicate may be qualified by an adverb or a word or a group of words doing the work of an adverb. Called extension or adverbial qualification. Ex. – She went home. The teachers spoke softly. Object: When the verb in the predicate is a transitive verb, it requires an object to complete its sense. In fact, if you say “smell”, it is not a complete sense. You want to know what you “smell”....

Class 8 general question

General Knowledge Q-1. Delhi New Chief Minister? Ans: Arvind Kejriwal Q-2. New CEO of NASSCOM? Ans: Debjani Ghosh Q-3. Prime Minister of India? Ans: Narendra Modi Q-4. Defence Minister of India? Ans: Rajnath Singh Q-5. Education Minister of India? Ans: Dharmendra Pradhan Q-6. Home Minister of India? Ans: Amit Shah Q-7. Who is the current President of India? Ans: Droupadi Murmu Q-8. Who is the largest kangaroo in the world? Ans: Red Kangaroo Q-9. What is the visible part of the sun called? Ans: The Photosphere Q-10. In which galaxy is the Earth located? Ans: The Milky Way Galaxy Q-11. What planet is known as Red Planet? Ans: Mars Q-12. What is the name of the first satellite sent into space? Ans: Sputnik Q-13. MLA full form? Ans: Member of Legislative Assembly Q-14. An earthworm breathes with the help of? Ans: Skin Q-15. Which bird flies backward? Ans: Hummingbird Q-16. What is the world’s largest country? Ans: Russia Q-...

Chapter 9 class 8 friction science book work

 Q–1 Fill in the blanks : 1. Friction opposes the motion between the surfaces in contact with each other. 2. Friction depends on the nature of surface. 3. Friction produces heat. 4. Sprinkling of powder on the carrom board reduces friction. 5. Sliding friction is lesser than the static friction. Q–2 Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below: a) Rolling, static, sliding b) Rolling, sliding, static c) Static, sliding, rolling d) Sliding, static, rolling Ans: Static, sliding, rolling Q–3 Amina runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be: Options: a) Wet marble floor, dry marble floor, newspaper and towel b) Newspaper and towel, dry marble floor, wet marble floor c) Towel, newspaper, dry marble floor, wet marble floor d) Wet marble floor, dry ...