Data Handling Class 7 Notes Maths Chapter 3

Data Handling Class 7 NotesOn this page, you will find Data Handling Class 7 Notes Maths Chapter 3 Pdf free download. CBSE NCERT Class 7 Maths Notes Chapter 3 Data Handling will seemingly help them to revise the important concepts in less time.

CBSE Class 7 Maths Chapter 3 Notes Data Handling

Data Handling Class 7 Notes Conceptual Facts

1. Data: The collection of informations in the form of numerical figures is called data.
Each number in a data is called observation or variate and number of times a particular observation occurs is called its frequency.

2. Range: The difference between the highest and the lowest observation in a given data is called ‘Range’.

3. Frequency distribution table: A table representing the frequency of various observations is called frequency distribution table.

4. Mean, Average or Arithmetic Mean:
\(\text { Mean }=\frac{\text { Sum of all observations }}{\text { Number of observations }}=\frac{\Sigma x_{i}}{\Sigma f_{i}}\) where i=1,2,3,…………

Mean of grouped data \(=\frac{\Sigma f_{i} x_{i}}{\Sigma f_{i}}\) i=1,2,3,…………

5. Median: When the observations are arranged in ascending or descending order, then the middle observation is called its Median.
Data Handling Class 7 Notes Maths Chapter 3

6. Mode: The observation which occurs maximum number of times in a given data is called its ‘mode’. Mean, median
and mode are called measures of central tendency.

7. Bar graph: The representation of data in the form of bars of uniform width is called bar graph.

8. A double bar graph is used to compare the information related to two types of data.

9. Probability is a chance of happening and not happening and event.

10. The probability of an event which is certain to happen is 1. It is also called as ‘sure event’.

11. The probability of an event which is impossible to happen is 0. It is also called as ‘impossible event’.

Practical Geometry Class 7 Notes Maths Chapter 10

On this page, you will find Practical Geometry Class 7 Notes Maths Chapter 10 Pdf free download. CBSE NCERT Class 7 Maths Notes Chapter 10 Practical Geometry will seemingly help them to revise the important concepts in less time.

CBSE Class 7 Maths Chapter 10 Notes Practical Geometry

Practical Geometry Class 7 Notes Conceptual Facts

1. By using properties of a transversal and parallel lines, a line parallel to a given line passing through a given point lying not on the line can be drawn.
Let P is any point outside of the given line T. P is joined to any point Q on the line T.
Join P and Q. Draw an angle 2 equal to angle 1. We get m || l.

2. We can draw a triangle if any one of the following conditions are given:

  • Three sides (By SSS criterion)
  • Two sides and the angle between them (By SAS criterion)
  • Two angles and the side included between them (By ASA criterion)
  • The hypotenuse and a leg of a right-angled triangle (By RHS criterion)

Practical Geometry Class 7 Notes Maths Chapter 10

NCERT Class 7 Maths Notes

NCERT Class 7 Maths Notes Pdf free download provided gives you an overview of the respective chapter and prepared in a manner that every concept is covered as per the syllabus guidelines. NCERT Notes for Class 7 Maths Standard are very effective for students to have last minute quick revision. Download the required study material from the resources available here and score higher grades in your exams.

CBSE Class 7 Maths Notes

  1. Integers Class 7 Notes
  2. Fractions and Decimals Class 7 Notes
  3. Data Handling Class 7 Notes
  4. Simple Equations Class 7 Notes
  5. Lines and Angles Class 7 Notes
  6. The Triangles and its Properties Class 7 Notes
  7. Congruence of Triangles Class 7 Notes
  8. Comparing Quantities Class 7 Notes
  9. Rational Numbers Class 7 Notes
  10. Practical Geometry Class 7 Notes
  11. Perimeter and Area Class 7 Notes
  12. Algebraic Expressions Class 7 Notes
  13. Exponents and Powers Class 7 Notes
  14. Symmetry Class 7 Notes
  15. Visualising Solid Shapes Class 7 Notes

We believe the information shared regarding the NCERT Notes for Class 7 Maths & Study Material has aided in your preparation. If you need any further assistance do leave us a comment and we will get back to you at the earliest possible. Stay tuned to our site for more information on Class 7th Maths Notes, Study Materials, and other preparation related stuff.

NCERT Class 7 Civics Chapter 9 Notes Struggles for Equality

On this page, you will find NCERT Class 7 Civics Chapter 9 Notes Pdf free download. CBSE Class 7 Social Science Notes Civics Chapter 9 SST Struggles for Equality will seemingly help them to revise the important concepts in less time.

Struggles for Equality Class 7 Notes Social Science Civics Chapter 9

CBSE Class 7 Civics Chapter 9 Notes Understanding The Lesson

1. The Indian constitution recognizes all Indians as equal before the law and states. No person can be discriminated on any ground.

2. All adults in India have the equal right to vote during elections and this power has been used by people to elect or replace their representatives.

3. The vote of one person is as good as that of another.

4. Poverty and the lack of resources are the key reasons for inequality in India.

5. Discrimination on the basis of a person’s religion, caste and sex is another significant factor for why people are treated unequally in India.

6. Dalit, Adivasi and Muslim girls drop out of school in large numbers. This is a combined outcome of poverty, social discrimination and the lack of good quality school facilities for these communities.

7. In each community and in society there are some respectable people who fight of equality. They may be well-respected because they treat all persons with dignity and are, therefore, trusted and play an important role to resolve issues in the community.

8. In India, there are several struggles in which people have come together to fight for issues that they believe are important.

9. There are many such struggles such as those among beedi workers, fisher-folks, agricultural labourers, slum-dwellers and each group is struggling for justice in its own way.

10. Many times they form cooperatives or other collective ways by which people can have more control over resources.

11. In the villages adjoining to the forest areas, when sanctuaries for animals are constructed, many poor people are displaced and people are forced to go and build new homes and new lives.

12. In urban areas, bastis in which poor people live are often displaced to the areas located outside of the city. Displaced poor people are severely disrupted.

13. There are several organizations across the country fighting for the rights of the displaced.

14. Tawa Matsya Sangh-a federation of Fisherworker’s cooperatives-an organization fighting for the rights of the displaced forest-dwellers of the Satpura forest in Madhya Pradesh.

15. The Tawa, originating in the Mahadeo hills of Chindwara district, flows through Betul, before joining the Narmada in Hoshangabad.

16. The Tawa dam began to be built in 1958 and was completed in 1978. It submerged large areas of forest and agricultural land. People of 33 villages were displaced. Some of the displaced people settled around the reservoir and apart from their meager farms, found a livelihood in fishing.

17. In 1994, the government gave the rights for fishing in the Tawa reservoir to private contractors. These contractors got cheap labour from outside. The villagers stood united and decided to set up an organization to protect their livelihood rights. Thus, they formed Tawa Matsya Sangh (TMS). And after long struggles they were granted right to fishing for their livelihood by the Madhya Pradesh government in 1996.

18. For the upliftment of the needs of fishermen, Tawa Matsya Sangh played a great role to make them able to increase their earning substantially. The Sangh arranges for fair price, transport, selling in a market where they get a good price, loans to fishermen for repair and the buying of new nets etc. Thus, the fisher­men have started to earn three times more than they earned earlier.

19. A dam is built across a river at sites where it can collect a lot of water. Dam submerges vast areas of land. The Tehri dam, Uttarakhand submerged old Tehri town and 100 villages. Nearly one lakh people were displaced from the construction of Tehri dam.

20. The Indian Constitution provides equality of all persons. Issues of equality are central to a democracy.

21. The privatization of health services in the country, the increasing control that business houses exert on the media, the low value given to women and their work, and the low earning made by small farmers who grow cotton are the issues that substantially affect poor and marginalized communities, and therefore, concern economic and social equality in the country.

22. The dignity and self-respect of each person and their community can only be realized if they have ad­equate resources to support and nurture their families and if they are not discriminated against.

Struggles for Equality Class 7 CBSE Notes Important Terms

Dam: Dam is built between the river to collect a lot of water.

Reservoir: A large natural or artificial lake used as a source of water supply.

TMS: TMS stands for Tawa Matsya Sangh which is an organization formed for betterment of affected fishermen.

Creative expression: Those who use their pen, or their voice, or their ability to dance to draw attention to issues are called creative artists. Their expressions and methods are called cre­ative expressions.

NCERT Class 7 Civics Chapter 8 Notes A Shirt in the Market

On this page, you will find NCERT Class 7 Civics Chapter 8 Notes Pdf free download. CBSE Class 7 Social Science Notes Civics Chapter 8 SST A Shirt in the Market will seemingly help them to revise the important concepts in less time.

A Shirt in the Market Class 7 Notes Social Science Civics Chapter 8

CBSE Class 7 Civics Chapter 8 Notes Understanding The Lesson

1. Buying and selling take place at every step in the chain.

2. Swapna is a small farmer in Kumool, Andhra Pradesh who grows cotton on her small piece of land. She supplies cotton to the trader. It takes four months to grow the cotton.

3. Cultivation of cotton requires high levels of inputs as fertilizers and pesticides and the farmers have to incur heavy expenses on account of these. Most often, the small farmers need to borrow money to meet these expenses.

4. Erode’s bi-weekly cloth market in Tamil Nadu is one of the largest cloth markets in the world. A large va­riety of cloth is sold in this market. Clothes are made by weavers in the villages around and0 also brought here for sale.

5. Weavers bring cloth that has been made on order from the merchant. These merchants supply cloth on order to garment manufacturers and exporters around country. They purchase the yam and give instructions to the weavers about the kind of cloth that is to be made.

6. Weavers get the yarn from the merchants and supply them the clothes. This arrangement has two advantages. The weavers do not have to spend their money on purchase of yam. Secondly, the weavers know from the outset what cloth they should make and how much of it is to be woven.

7. At the cloth market, the merchants sell the cloth to the garment factories. In this way, the market works more in favour of the merchants.

8. Weavers are required to invest a lot of money to buy looms. The weavers invest their savings or borrow money at high-interest rates. One loom cost is around 20,000/- and they require atleast two looms. These looms cannot be operated alone and hence their family members work together. They earn about 3,500/­per month.

9. A variety of sarees, towels, shirts, ladies dress material and bed-sheets are produced in these looms. The arrangement between the merchant and the weavers is an example of putting-out system whereby the merchant supplies the raw material and receives the finished product. It is prevalent in the weaving in­dustry in most regions of India.

10. Weaver are paid very little by the merchant under the putting-out system. Weaver’s cooperatives are one way to reduce the dependence on the merchant and to earn a higher income for the weavers.

11. The garment exporting factory use the cloth to make shirts. The shirts are exported to foreign buyers. The exporter tries his best to meet the conditions set by these powerful buyers.

12. In the garment factory many workers work. Most of these workers are employed on a temporary basis. Whenever the employer feels that a worker is not needed, the worker can be asked to leave.

13. Worker’s wages are fixed according to their skills. In most of the cases women are employed as helpers for thread cutting, buttoning, ironing and packaging. These jobs have the lowest wages.

14. The foreign businessperson makes huge profits in the market. The garment exporter make only moderate profits. The small farmers and the weaver do not get a fair price in the market. The merchants or traders are somewhere in between.

Markets Around Us Class 7 CBSE Notes Important Terms

Ginning mill: A factory where seeds are removed from cotton balls.

Exporter: A person who sells goods abroad.

Profit: The amount that is left or gained from earnings after deducting all the costs. If the costs are more than the earnings, it would lead to a loss.