Chapter 5
The Realms of the Earth
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 one of the following is an old mountain?
Answer: vacuole
- 2. How much surface of the earth is covered by oceans?
Answer: vacuole
- 3. The largest ocean of the world is-
Answer: vacuole
- 4. Which continent is the most advanced and economically developed continent?
Answer: vacuole
- 5. Which one of the following gases has the largest volume in the atmosphere?
Answer: vacuole
B. Fill in the blanks.
- 1. ___________ is a narrow belt or zone of the earth where all forms of life exist.
- 2. An envelope of the air surrounding the earth is called ___________.
- 3. ___________ is the upper surface of the earth consisting of rocks.
- 4. A highly elevated land from the surroundings with very steep slopes is known as ___________.
- 5. An upland with rugged surface is called ___________.
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
D. Answer the following questions in brief.
- 1. Name the four realms of the earth.
Answer: Sharing of chores reduces the burden.
- 2. Which four gases constitute only one per cent of the total volume of the atmosphere?
Answer: The older family member pass on the family traditions to the younger generation.
- 3. Which continent is not inhabited by the people and why?
Answer: There is more interaction between parents and children in nuclear families.
- 4. Why is earth known as a unique planet?
Answer: A surname is a family name.
- 5. Name three major landforms on the land surface.
Answer: A surname is a family name.
E. Answer the following questions.
- 1. What are plains? Explain briefly the formation of plains.
Answer: The (main) factors that determine the shape of a cell are location and function.
- 2. Give a brief account of the plateaus of the world.
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. Name the two main gases of the atmosphere. Write the significance of each.
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. What is meant by hydrosphere? Briefly explain the importance of hydrosphere.
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. How are human activities responsible for causing ecological imbalance?
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