TENSES

TENSES 

TENSES ( ANSWERS)

NELSON MANDELA: LONG WALK TO FREEDOM

PRACTICE SHEET 

PRACTICE SHEET (ANSWERS)

TEXTUAL QUESTIONS

MATHEMATICS: WORKSHEET OF POLYNOMIALS

 

WORKSHEET OF REAL NUMBERS

 

RESOURCES AND DEVELOPMENT

PPT

https://drive.google.com/file/d/1wOHQPdWx9JHZWNJQ99cOkLflSXzm2bc3/view?usp=drivesdk

QUESTIONS and ANSWERS

RESOURCE AND DEVELOPMENT

Q.1) State the difference between renewable and non-renewable resources?

Ans. 

• Renewable: Resources which gets replenished by nature and may be overused,
  e.g. Crops and Plants

• Non Renewable: Resources which get exhausted due to excessive usage over the years.
  e.g. Crude Oil

Q.2) In which of the states has mining caused severe land degradation?

Ans.

• Jharkhand, Chhattisgarh, Madhya Pradesh and Odisha.

Q.3) State the main cause of land degradation in Punjab?

Ans.

• Over Irrigation

• High usage of HYV seeds.

• Chemical Fertilizers and Pesticides.

Q.4) What are the methods of checking soil erosion?
Ans.)

• Strip Cropping, Terrace farming and Contour farming.

Q.5) Define the following:-
Ans.)

• Current Fallow Land: The land left uncultivated for one or less than one agricultural year.

• Other than Current Fallow Land: The land left uncultivated for past 1 to 5 years.

• Culturable waste land: The land left uncultivated for more than 5 years.

Q.6) How are alluvial soil formed? How is Bhangar different from Khadar?
Ans.)

• Alluvial soil is formed by sediment deposited by river water.

KHADAR	BHANGAR
It is a new alluvial soil.	It is an old alluvial soil.
Lower concentration of Kankar nodules.	Higher concentration of Kankar nodules.
More fine particles.	Less fine particles.
It is more fertile.	It is less fertile.

Q.7) Difference between stock and reserved resources stating two points each.
Ans.)

STOCK	RESERVE
Materials which have a potential to satisfy humans but we do not have appropriate technology to access these are termed as stock.	These are subset of stock. They can be put to use with existing knowledge but their use has not been started.
Water, which is a compound of gases – H2 & O2, which can be rich source of energy but we do not know how to use them.	River water is used as a source of hydro-electricity but to a limited extent. Hence, the water in dams, forest are reserved for future use.

Q.8) What is Agenda 21? List its two Principles?
Ans.)

• ‘Agenda 21’ was adopted at the 1st International Earth Summit held in 1992 at Rio De Janeiro, Brazil.

• The two principles are as follows.

• To combat environmental damage, poverty, disease through global co-operation or common interests, mutual needs and share responsibilities.

• Every local Government should draw it’s on ‘Agenda 21’.

Q.9) Explain any three factors responsible for soil formation?
Ans.)

• Parent rock:     It provides the basic requirements for soil formation.

• Vegetation:     Plant & Animal organisms help in weathering of rocks slowly, but continuously.

• Various features of nature such as; changes in temperature, actions of running water, wind and glaciers, activities of decomposers, etc contributes to formation of soil.

• Chemical and organic changes take place in soil.

• Climate breaks the parent rock into smaller pieces.

Q.10) Why is soil considered as a resource?
Ans.)

• Soil satisfies our daily needs.

• It is the most important renewable natural resources.

• It is the medium of plant growth.

• It supports different types of living organism.

• It is the base of our lives.

Q.11) Mention any two human activities which are responsible for the process of soil erosion. Explain the 2 types of soil erosion observed in India?
Ans. 

• Human Activities: Deforestation, Overgrazing, Mining and Construction, etc.

• Types of Soil Erosion:

• Gullies: The running water cuts through the clayey soil and makes deep channels/gullies. The unfit lands caused by gullies are called Bad Lands or Ravines.

• Sheet Erosion: Water flows as a sheet over large areas down a slope. The top soil is washed away.

Q.12) Why is resource planning important in India?
Ans.

• Resource planning is a technique or skill for proper utilisation of resources.

• As resources are limited, their planning is so necessary that we can use them properly and also save them for future generations.

• Resources are not only limited but they are distributed over different parts of country.

• Essential for production of resources and to protect them from exploitation.