Chapter 2
Natural Resources Land Soil and Water
Highlights
- A. Tick the correct option
- B. Fill in the blanks
- C. Match the following
- D. Correct the following sentences
- E. Answers the following questions
EXERCISE
A. Tick the Correct Option
- 1. Which type of erosion leads to desertification?
Answer: vacuole
- 2. Which one of the following is suitable for restoring soil fertility?
Answer: vacuole
- 3. Which of the following is not in favour of multipurpose river valley projects?
Answer: vacuole
- 4. Maintenance of lakes and ponds is essential for-
Answer: vacuole
- 5. Which factor is more responsible for the quick formation of soil in Rajasthan?
Answer: vacuole
B. Fill in the blanks.
- 1. Earth’s surface is divided into ___________ and ___________ zones.
- 2. To maintain ecological balance, ___________ % of the land should be under forest.
- 3. Planting of trees is commonly known as ___________.
- 4. The main source of fresh water is ___________.
- 5. Earth is known as ___________ planet due to the presence of water on it.
C. Match the following :
- Column A
- 1. Golgi Complex
- 2. Ribosomes
- 3. Chromosomes
- 4. Dead cells
- 5. Photosynthesis
- Column B
- (a) genes
- (b) cork
- (c) chloroplasts
- (d) packaging center
- (e) protein synthesis
C. Write a technical term or an appropriate word for each of the following statements.
- 1. It is formed by decomposed parts of plants and animals.
Answer: Sharing of chores reduces the burden.
- 2. The original rock from which the soil is formed.
Answer: The older family member pass on the family traditions to the younger generation.
- 3. It is formed as a result of long continued weathering process of rocks.
Answer: There is more interaction between parents and children in nuclear families.
- 4. A project which serves various purposes at the same time.
Answer: A surname is a family name.
- 5. The process in which the top layer of the soil is removed by the natural and human activities.
Answer: A surname is a family name.
D. Answer the following questions in brief.
- 1. Why is soil considered an important resource? Give any three reasons.
Answer: The (main) factors that determine the shape of a cell are location and function.
- 2. Highlight any three causes of soil erosion.
Answer: Distinguish between unicellular and multicellular organisms are
Unicellular organisms are made up of a single cell. e.g., Euglena and Amoeba.
Multicellular organisms are made up of many cells. e.g., Humans and Birds.
- 3. Explain hydrological cycle with the help of a diagram.
Answer: All organisms are made up of cells. A cell is capable of independent existence. Due to this, cell is called the structural and functional unit of life.
- 4. How does river water get polluted? Explain.
Answer: Mitochondria is known as the Powerhouse of the cell.
Mitochondria are the site of cellular respiration. Energy is produced during this process. Due to this, mitochondria are called the Powerhouse of the cell.
- 5. Identify any three ecological problems caused by building large dams.
Answer: All organisms are made up of cells. A cell is capable of independent existence. Due to this, cell is called the structural and functional unit of life.
E. Answer the following questions.
- 1. Explain any five factors responsible for the formation of soil.
Answer: All organisms are made up of cells. A cell is capable of independent existence. Due to this, cell is called the structural and functional unit of life.
- 2. What is meant by land use pattern? Why is it important to study the land use pattern? List the factors influencing the utilisation of land.
Answer: All organisms are made up of cells. A cell is capable of independent existence. Due to this, cell is called the structural and functional unit of life.
- 3. What are Multipurpose River Valley Projects? Name any two such projects. List the main objectives of a multipurpose river valley project.
Answer: All organisms are made up of cells. A cell is capable of independent existence. Due to this, cell is called the structural and functional unit of life.
- 4. Suggest any five steps to conserve soil.
Answer: All organisms are made up of cells. A cell is capable of independent existence. Due to this, cell is called the structural and functional unit of life.
- 5. Suggest any five methods for the conservation of water.
Answer: All organisms are made up of cells. A cell is capable of independent existence. Due to this, cell is called the structural and functional unit of life.
Related Topics
- Chapter 1 The Cell – Its Structure and Functions
- Chapter 2 Microorganisms: Friends or Foes
- Chapter 3 Metals and Non-Metals
- Chapter 4 Force and Pressure
- Chapter 5 Friction
- Chapter 6 Sources of Energy
- Chapter 7 Combustion
- Chapter 8 Conservation of Plants and Animals
- Chapter 9 Crop Production and Its Management
- Chapter 10 Refraction and Dispersion of Light
- Chapter 11 The Human Eye
- Chapter 12 Sound
- Chapter 13 Synthetic Fibres and Plastics
- Chapter 14 Reproduction in Animals
- Chapter 15 Reaching the Age of Adolescence
- Chapter 16 Electric Current and Its Chemical Effects
- Chapter 17 Stars and Solar System
- Chapter 18 Earthquakes
- Chapter 19 Pollution of Air
- Chapter 20 Pollution of Water