Chapter 5
Water Surrounding 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. The water cycle is-
Answer: vacuole
- 2. The three states of water are-
Answer: vacuole
- 3. What turns water on the earth into vapours in the water cycle?
Answer: vacuole
- 4. When clouds get too heavy to hold water-
Answer: vacuole
- 5. In coastal areas, warm ocean currents cause-
Answer: vacuole
B. Fill in the blanks.
- 1. The largest natural source of water is ___________.
- 2. When the level of ocean water rises, it is a ___________ tide.
- 3. ___________ port in India is an example of tidal port.
- 4. Tidal energy is a ___________ source of energy.
- 5. Cold currents flow along the ___________ coast of the oceans.
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. On what factors does the height of a wave depend?
Answer: Sharing of chores reduces the burden.
- 2. Define an ocean current.
Answer: The older family member pass on the family traditions to the younger generation.
- 3. How are tides caused?
Answer: There is more interaction between parents and children in nuclear families.
- 4. Name the important components of the water cycle.
Answer: A surname is a family name.
- 5. Name three valuable resources which are found in abundance in the ocean.
Answer: A surname is a family name.
E. Answer the following questions.
- 1. How are tides useful to us?
Answer: The (main) factors that determine the shape of a cell are location and function.
- 2. How are oceans beneficial to us in improving the quality of life?
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 the water 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. Explain three effects of ocean currents.
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. Suggest four ways to help people affected by devastation due to Tsunami.
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