The DAV Class 5 Science Book Solutions and DAV Class 5 Science Chapter 7 Question Answer – Importance of Water are essential study tools for DAV public school students in Class 5.
DAV Class 5 Science Chapter 7 Question Answer – Importance of Water
DAV Class 5 Science Ch 7 Question Answer – Importance of Water
Something To Know
A. Fill in the blanks.
Question 1.
Water helps in ______ of food in animals.
Answer:
digestion
Question 2.
Animals living in water are called ______
Answer:
aquatic animals
Question 3.
Animals, which can live both in water and on land, are called ______
Answer:
amphibious animals
Question 4.
Water, trapped between underground rocks, is called ______
Answer:
groundwater
Question 5.
______ and ______ are aquatic plants.
Answer:
lotus, hydrilla.
B. Write True or False for the following statements.
1. Water is required for germination of seeds.
2. Groundwater can be drawn up by a hand pump.
3. About 50% of water is present in seas and ocea
4. Octopus is an amphibious animal.
5. River water is purified for drinking purpose.
Answer:
1. Water is required for germination of seeds. (True)
2. Groundwater can be drawn up by a hand pump. (True)
3. About 50% of water is present in seas and ocea. (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:
(a) seas and oceans
2. Plants absorb water from the soil with the help of
(a) stem
(b) leaves
(c) branches
(d) roots
Answer:
(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:
(b) purifying river water
4. An example of an amphibious animal is
(a) fish
(b) frog
(c) hydrilla
(d) duckweed
Answer:
(b) frog
D. Answer the following Questions in brief.
Question 1.
Name any two water bodies that exist on the surface of earth.
Answer:
River and pond
Question 2.
What are animals living in water known as? Write names of two such animals.
Answer:
Animals living in water are known as aquatic animals, e.g. fish and octopus.
Question 3.
What are amphibious animals?
Answer:
Animals which can live both on land and in water are called amphibious animals.
Question 4.
Write names of four aquatic plants.
Answer:
Lotus, water lily, hydrilla and duckweed.
Question 5.
How do plants absorb water from the soil?
Answer:
Plants absorb water from the soil through their roots.
Question 6.
State two common methods of drawing out groundwater.
Answer:
Hand pump and stepwell.
E. Answer the following Questions.
Question 1.
Besides its domestic use, state three other uses of water.
Answer:
Besides domestic use, following are the three other uses of water:
(a) Irrigation
(b) Electricity generation
(c) Transportation
Question 2.
How does water help in excretion of waste material from animal bodies?
Answer:
The waste materials get dissolved in water. After that, it is excreted in the form of urine from animal bodies.
Question 3.
List any four ways in which water is important for plants.
Answer:
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 germination of seeds.
- Water is a natural habitat for many plants.
Question 4.
How can groundwater be drawn out , through tubewells?
Answer:
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.
Question 5.
What is a stepwell?
Answer:
A well which has steps on all sides is called a stepwell. The steps enable people to go down easily to fetch water.
Question 6.
How is water supplied in cities?
Answer:
Now-a-days, 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 i water is then sent to homes and offices through a network of pipes and pumps.
Value Based Question
Question 1.
State the values displayed by Kanika.
Answer:
Kanika shows concern for environment.
Question 2.
Name two aquatic animals and two aquatic plants, other than those mentioned above.
Answer:
Tortoise and crabs are two aquatic animals, duckweed and hydrilla are two aQuestion uatic plants.
Question 3.
Discuss, in your class, the steps that the village panchayat can suggest to reduce pollution in pond water.
Answer:
Panchayat can suggest following steps to reduce pollution in pond water:
- Stop washing clothes near the pond.
- Stop bathing in the pond.
- Prevent any discharging of sewage water in the pond.
- Clean the pond monthly.
Something To Do
Question 1.
Collect information, along with pictures, about some of the ‘baolis’ existing in various parts of India. Share and discuss this information with your classmates in the school.
Answer:
Do it yourself.
Question 2.
Work in a group of 4 – 5 students and make a water wheel, with the help of your teacher.
Answer:
Do it yourself.
Question 3.
Suggest ways and means of sensitizing people about the need of keeping water bodies free from pollution.
Answer:
Do it yourself
DAV Class 5 Science Chapter 7 Solutions – Importance of Water
I. Multiple Choice Questions (MCQs)
1. How much of total water on earth is present in rivers, lakes, ponds and glaciers?
(a) 10%
(b) 5%
(c) 3%
(d) 1%
Answer:
(c)3%
2. How much of body weight of humans is composed of water?
(a) 90%
(b) 70%
(c) 60%
(d) 30%
Answer:
(b) 70%
3. Which of the following is an aquatic plant?
(a) Duckweed
(b) Paddy
(c) Sundari
(d) Coconut
Answer:
(a) Duckweed
4. Frog is an example of which type of animal?
(a) Amphibian
(b) AQuestion uatic
(c) Terrestrial
(d) Desert
Answer:
(a) Amphibian
II. Fill in the Blanks
Question 1.
______ from animal bodies is excreted in the form of urine.
Answer:
Waste
Question 2.
______ of water makes it fit for drinking.
Answer:
Purification
Question 3.
Plants need water for ______ of seeds.
Answer:
germination
Question 4.
In a ______ a long pipe is inserted into the ground to get groundwater.
Answer:
tubewell.
III. Define the Following
Question 1.
Amphibious animals
Answer:
An animal which can live both on land and in water is called amphibious animal.
Question 2.
Aquatic animals
Answer:
An animal which lives in water is called aquatic animal.
Question 3.
Groundwater
Answer:
Water trapped between underground rocks is called groundwater.
Question 4.
Stepwell
Answer:
A well which has steps on all sides is called stepwell.
IV. Snswer the Following Questions
Question 1.
What is the importance of water for humans?
Answer:
The human body contains about 70% of water. We use water for drinking, washing, bathing, cooking, cleaning and for many other purposes. Water is required for digestion of food. Water is also required for elimination of waste from the body.
Question 2.
What is the importance of water for animals?
Answer:
Importance of water for animals:
- All animals take water.
- Water helps in digesting the food and absorbing the nutrients.
- Water helps in eliminating waste materials from the body.
- Water bodies are natural habitats for many animals.
Question 3.
Explain the availability of water on earth.
Answer:
About 97% of water on the earth is present in seas and oceAnswer: Remaining 3% is present in rivers, ponds, lakes, streams and glaciers. A small part of water is available as groundwater.