CLASS-7 SUBJECT-SCIENCE CHAPTER-15 LIGHTS.

 EVENTS CONVENT HIGH SCHOOL

12/10/2021      CLASS-7     SESSION 2021-22
SUBJECT : SCIENCE

chapter - 15
lIGHTS 

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Q.1.Fill in the blanks:
(a) An image that cannot be obtained on a screen is called ___________ .
(b) Image formed by a convex is __________ always virtual and smaller in size.
(c) An image formed by a __________ mirror is always of the same size as that of the object.
(d) An image which can be obtained on a screen is called a __________ image.
(e) An image formed by a concave __________ cannot be obtained on a screen.
Ans.(a) virtual image (b) mirror (c) plane (d) real (e) lens

Q.2.Mark ‘T’ if the statement is true and ‘F’ if it is false:
(a) We can obtain an enlarged and erect image by a convex mirror. (T/F)
(b) A concave lens always form a virtual image. (T/F)
(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)
(d) A real image cannot be obtained on a screen. (T/F)
(e) A concave mirror always form a real image. (T/F)
Ans. a) F (b) T (c) T (d) F (e) F

Q.3. Match the items given in Column I with one or more items of Column II

Ans.

Q.4.State the characteristics of the image formed by a plane mirror.
Ans.(i) Plane mirror forms an erect image.
(ii) It forms a virtual image.
(iii) Size of the image is same as that of the object.
(iv)Image is formed at the same distance behind the mirror as the object stands in front of it.
(v) Image formed is a laterally inverted image i.e., right hand side of the object seems to be the left hand side and vice-versa.

Q.5.Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
Ans.Letters like A, H, I, M, O, T, U ,V, W etc. appear same when seen through a plane mirror

Q.6.What is a virtual image? Give one situation where a virtual image is formed.
Ans.The image which cannot be taken on a screen is called virtual image. When some object is placed very close to the concave mirror we don’t get any image on the white screen placed behind the mirror. Such image is called virtual image.

Q.7. State two differences between a convex and a concave lens.

Q.8. Give one use each of a concave and a convex mirror.
Ans. Use of concave mirror:
Concave mirror is used by dentists to examine the teeth.
Use of convex mirror:
Convex mirror is used as side view mirror in vehicles

Q.9. Which type of mirror can form a real image?
Ans. Concave mirror can form a real image.

Class-6 Subject -Science Chapter-13 Fun with Magnets

 EVENTS CONVENT HIGH SCHOOL

12/10/2021      CLASS-6     SESSION 2021-22
SUBJECT : SCIENCE

chapter-13
FUN WITH MAGNETS 

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1. Fill in the blanks in the following:

(i) Artificial magnets are made in different shapes such as_________ ,_______ and
(ii) The materials which are attracted towards a magnet are called_________
(iii) Paper is not a________
(iv) In olden days, sailors used to find direction by suspending a piece of
(v) A magnet always has ________poles.
Ans:
(i) bar magnet, horse-shoe magnet and cylindrical magnet
(ii) magnetic materials
(iii) magnetic
(iv) bar magnet or lode stone
(v) two or a pair of

2. State whether the following statements are true or false:
(i) A cylindrical magnet has only one pole.
(ii) Natural magnets were discovered in Greece.
(iii) Similar poles of a magnet repel each other.
(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
(v) Bar magnets always point towards North-South direction when suspended freely in air.
(vi) A compass can be used to find East-West direction at any place.
(vii) Rubber is a magnetic material.
Ans: 
(i) False
(ii) True
(iii) True
(iv) False
(v) True
(vi) True
(vii) False

3. It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic. Name a material that might have been used to make some part of it.
Ans:  Iron is used to make some part of sharpener due to which it is attracted toward magnet.

4.  Column I shows different positions in which one pole of a magnet is placed near that of the other. Column II indicates the resulting action between them for each situation. Fill in the blanks.

Ans:

VERY SHORT ANSWER TYPE QUESTIONS

1. Name the compound of iron contained in lode stone.
Ans: The compound of iron is iron oxide or magnetite.

2. Name the shepherd after which magnet was named.
Ans: Magnets.

3. How can you separate a magnetic substance from a mixture?
Ans: By using a bar magnet, the magnetic substance is separated from mixture.

4. At which place on a magnet, its magnetic force is maximum?
Ans: At poles.

5. In which direction does a suspended magnet come to rest?
Ans: Magnet comes to rest in N-S (north-south) direction.

SHORT ANSWER TYPE QUESTIONS

1. Draw the diagram of (a) Bar magnet (b) Horse-shoe magnet.
Ans:

2.Identify magnetic and non-magnetic substances from the list given below: Iron, Steel, Nickel, Plastic, Wood, Copper and a Stainless Steel spoon
Ans:

3. Draw a diagram of a magnetic compass.
Ans:

4. Write main properties of a magnet.
Ans: (i) Magnet has two poles—south pole and north pole.
(ii) Poles of magnet cannot be isolated.
(iii) Like poles repel each other and unlike poles attract each other.
(iv) Freely suspended magnet aligns in N-S direction.

5.Write two methods by which a magnet can be demagnetised.
Ans: (1) By hammering the magnet strongly.
(2) By heating a magnet strongly and keeping it in the east-west direction.

CLASS-8 SUBJECT -SOCIAL SCIENCE HISTORY CHAPTER-5 WHEN PEOPLE REBEL

 EVENTS CONVENT HIGH SCHOOL

09/10/2021      CLASS-8     SESSION 2021-22
SUBJECT :SOCIAL SCIENCE(HISTORY)

chapter-5
WHEN PEOPLE REBEL 

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Question 1.Choose the correct option:

(i) The new law passed in 1850 made
(a) conversion into Christianity easier
(b) people of India Christians
(c) the life of the Indians difficult
(d) none of the above

(ii) The Revolt of 1857 began from:
(a) Lucknow
(b) Kanpur
(c) Awadh
(d) Meerut

(iii) Mangal Pandey, a young soldier, was hanged to death for
(a) killing an Englishman
(b) attacking his officers in Barrackpore
(c) telling lies
(d) attacking English factories

(iv) The Mughal emperor Bahadur Shah Zafar died in-
(a) the Rangoon jail
(b) the Royal palace
(c) the Mosque
(d) the Audience Hall

(v) The British regained control of the country in the year
(a) 1857
(b) 1858
(c) 1859
(d) 1860
Answer:
(i) (a), (ii) (d), (iii) (b), (iv) (a), (v) (c)

Question 2.Fill in the blanks with appropriate words to complete each sentence.

1. In the countryside peasants and zamindars resented the …………. and the rigid methods of collection.
2. The British passed laws to stop the practice of …………….. and to encourage the …………. of widows.
3. The rebels rushed to Delhi from Meerut and proclaimed ……………. as their leader.
4. Nana Saheb, the adopted son of the late Peshwa Baji Rao, gathered armed forces and expelled the ……………. from the city.
5. ……………. fought a guerrilla war against the British with the support of several tribal and peasant leaders.

Answer:

1. High taxes; revenue
2. Sati, remarriage
3. Bahadur Shah Zafar
4. British Garrison
5. Tantia Tope

Question 3.State whether each of the following statements is True or False.

1. None of the Indians wanted to change existing social practices.
2. In 1856, Governor-General Canning decided that Bahadur Shah Zafar would be the last Mughal king.
3. The Indian sepoys were unhappy about their pay, allowances and conditions of service.
4. The British could not repress the revolt and called the rebels for negotiations.
5. After the Revolt of 1857, the Governor-General of India was given the title of Admiral-General.

Answer:

1. False
2. True
3. True
4. False
5. False

Question 4.
Match the items given in Column A correctly with those given in Column B.

Answer:
(i) (d), (ii) (c), (iii) (a), (iv) (e) (v) (b).

Very Short Answer Type Questions

Question 1.What was the plea of Nana Saheb, the adopted son of Peshwa Baji Rao-II?
Answer:
Nana Saheb pleaded that he be given his father’s pension when the latter died.

Question 2.What was the first step taken by the Company towards ending the Mughal dynasty?
Answer:
The name of the Mughal king was removed from the coins minted by the Company.

Question 3.Why were the Indian sepoys unhappy with the British rule? Give any one reason.
Answer:
The Indian sepoys were underpaid.

Question 4.What rumour spread among the sepoys of the Meerut regiment about the new cartridges?
Answer:
The rumour spread that the new cartridges were coated with the fat of cows and pigs.

Question 5.What did the ageing Mughal emperor Bahadur Shah Zafar do after he was declared the leader of the rebels?
Answer:
He wrote letters to all the chiefs and rulers of the country to come forward and organise a confederacy of Indian states to fight the British.

 Short Answer Type Questions

Question 1.Under what pretext did the Company take over Awadh?
Answer:
In 1801, a subsidiary alliance was imposed on Awadh, and in 1856, it was taken over. Governor-General Dalhousie declared that the territory was being misgoverned and British rule was needed to ensure proper administration.

Question 2.How did the Company plan to bring an end to the Mughal dynasty?
Answer:

1. First of all the name of the Mughal king was removed from the coins minted by the Company.
2. In 1849, Governor-General Dalhousie announced that after the death of Bahadur Shah Zafar, the family of the king would be shifted out of the Red Fort and given another place in Delhi to live in.
3. In 1856, Governor-General “Canning decided that Bahadur Shah Zafar would be the last Mughal king and after his death his descendants would be known as princes.

Question 3.Why were the Indian sepoys in the employ of the Company discontented? Give sufficient reasons.
Answer:
Reasons for their discontentment:

1. The Indian sepoys were given poor salaries and allowances.
2. The conditions of service also made them unhappy.
3. Some of the new rules even violated their religious sentiments and beliefs.
4. Those were the days when many people in the country believed that if they crossed the sea they would lose their religion and caste.
5. So when in 1824 the sepoys were told to go to Burma by the sea route to fight for the Company, they refused to follow this order.
6. As a result they were given severe punishment. What is more, in 1856, the Company passed a new law which stated that every new person who took up employment in the Company’s army had to agree to serve overseas if required.

Question 4.What reforms did the British introduce in the Indian society? How did the people of India respond to them?
Answer:
The British introduced several reforms:

1. They passed laws to stop the practice of sati and to encourage the remarriage of widows.
2. They promoted English language education.
3. In 1850, the Company passed a new law that made the conversion to Christianity easier.

Many Indians began to feel that the British were destroying their religion, their social customs and their traditional way of life. But at the same time there were other Indians who readily accepted the reforms introduced by the British. In fact, they wanted to change existing social practices.

Question 5.Why did the chiefs and rulers support the Mughal emperor Bahadur Shah Zafar in the revolt?
Answer:
The Mughal dynasty had ruled over a large part of the country. Most smaller rulers and chieftains controlled different territories on behalf of the Mughal ruler. Threatened by the expansion of British rule, many of them felt that if the Mughal emperor could rule again, they too would be able to rule their own territories once more, under the Mughal authority.