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Chapter 7 Importance of Water DAV Class 5 Science Solution
SOMETHING TO KNOW
A. Fill in the blanks.
1. Water helps in digestion of food in animals.
2. Animals living in water are called aquatic animals.
3. Animals, which can live both in water and on land, are called amphibious animals.
4. Water, trapped between underground rocks, is called groundwater.
5. Lotus and hydrilla are aquatic plants.
B. Write True or False for the following statements.
| 1. Water is required for germination of seeds. | Answer: True |
| 2. Groundwater can be drawn up by a hand pump. | True |
| 3. About 50% of water is present in seas and oceans. | False |
| 4. Octopus is an amphibious animal. | False |
| 5. River water is purified for drinking purpose. | True |
C. Tick (✓) the correct option.
1. About 97% of water is present in (a) seas and oceans (b) lakes (c) ponds (d) glaciers
Answer 1: (a) seas and oceans
2. Plants absorb water from the soil with the help of (a) stem (b) leaves (c) branches (d) roots
Answer 2: (d) roots
3. A rehat is used for (a) supplying water through taps. (b) purifying river water (c) drawing out groundwater for irrigation (d) absorbing water from the soil
Answer 3: (b) drawing out groundwater for irrigation
4. An example of an amphibious animal is (a) fish (b) frog (c) hydrilla (d) duckweed
Answer 4: (b) frog.
D. Answer the following questions in brief.
1. Name any two water bodies that exist on the surface of earth.
Ans 1. River and pond
2. What are animals living in water known as? Write names of two such animals.
Ans 2. Animals living in water are known as aquatic animals, e.g. fish and octopus.
3. What are amphibious animals?
Ans 3. Animals that can live both on land and in water are called amphibious animals.
4. Write names of four aquatic plants.
Ans 4. Lotus, water lily, hydrilla and duckweed.
5. How do plants absorb water from the soil?
Ans 5. Plants absorb water from the soil through their roots.
6. State two common methods of drawing out groundwater.
Ans 6. Hand pump and stepwell.
E. Answer the following questions.
1. Besides its domestic use, state three other uses of water.
Ans 1. Besides domestic use, the following are the three other uses of water: (a) Irrigation (b) Electricity generation (c) Transportation
2. How does water help in excretion of waste material from animal bodies?
Ans 2. The waste materials get dissolved in water. After that, it is excreted in the form of urine from animal bodies.
3. List any four ways in which water is important for plants.
Ans 3. Importance of water for plants:
• Plants take many nutrients along with water from the soil.
• Plants need water for preparing their own food.
• Plants need water during the germination of seeds.
• Water is a natural habitat for many plants.
4. How can groundwater be drawn out through tubewells?
Ans 4. A long pipe is inserted deep into the ground to make tubewell. Hand pump or electric pump can be used to draw water from a tubewell.
5. What is a stepwell?
Ans 5. A well that has steps on all sides is called a stepwell. The steps enable people to go down easily to fetch water.
6. How is water supplied in cities?
Ans 6. Nowadays, a well-planned water supply system is used in many villages and in all cities. In a water supply system, water from a river or groundwater is first purified through a series of processes. Purifying makes the water fit for drinking. The purified water is then sent to homes and offices through a network of pipes and pumps.
Chapter 1 |My Body |Class-5 DAV Science Question and Answer
Chapter 2 |Plants |Class-5 DAV Science Question and Answer
Chapter 3 |Forests |Class-5 DAV Science Question and Answer
Chapter 4 |Animals—Our Friends |Class-5 DAV Science Question and Answer
Chapter 5 |Food and Health |Class-5 DAV Science Question and Answer
Chapter 7 |Importance of Water |Class-5 DAV Science Question and Answer
Chapter 8 |Properties of Water |Class-5 DAV Science Question and Answer
Chapter 9 |Fuels |Class-5 DAV Science Question and Answer
Chapter 10 |Air |Class-5 DAV Science Question and Answer
Chapter 11 |Our Solar System |Class-5 DAV Science Question and Answer
Chapter 12 |Observing the Sky |Class-5 DAV Science Question and Answer