Chapter 1
Components of Environment
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. The shape of Deccan plateau is-
Answer: Water
- 2. Lakshadweep islands are located in-
Answer: internal disturbance of the earth
- 3. Many rivers rise in-
Answer: rainfall
- 4. The Thar desert is located mainly in-
Answer: soil
- 4. The Thar desert is located mainly in-
Answer: 1972
B. Fill in the blanks.
- 1. A situation or condition in which an organism lives.
- 2. The only planet in our solar system where life exists.
- 3. The uppermost part of the lithosphere which is rich in silica and aluminium.
- 4. Sial The sphere of air that envelopes the earth.
- 5. Mass of water on the earth’s surface.
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 major components of the environment.
Answer: Sharing of chores reduces the burden.
- 2. What is meant by Sima and Sial?
Answer: The older family member pass on the family traditions to the younger generation.
- 3. Mention the distribution of water in the Northern and Southern hemispheres.
Answer: There is more interaction between parents and children in nuclear families.
- 4. Give the literal meaning of four spheres of environment.
Answer: A surname is a family name.
- 5. What is the atmosphere composed of?
Answer: A surname is a family name.
E. Answer the following questions.
- 1. Differentiate between the physical and the biological environment.
Answer: The (main) factors that determine the shape of a cell are location and function.
- 2. Why is the earth called the ‘Blue Planet’?
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. Define biosphere. Why is it important for us?
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. Explain with the help of an example how physical and biological components of the environment are interdependent.
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. Explain two ways in which human beings are disturbing the natural environment.
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