DAV Class 5 Science Chapter 3 Question Answer – Forests

The DAV Class 5 Science book Solutions and DAV Class 5 Science Chapter 3 Question Answer – Forests are essential study tools for DAV public school students in Class 5.

DAV Class 5 Science Chapter 3 Question Answer – Forests

DAV Class 5 Science Ch 3 Question Answer – Forests

Something To Know

A. Fill in the blanks.

Question 1.
Forests serve as home to many types of ______
Answer:
animals

Question 2.
Forests absorb large amounts of ______
Answer:
carbon dioxide

Question 3.
Deforestation ______ rainfall in the surrounding areas.
Answer:
reduces

Question 4.
______ is the largest bird sanctuary in Asia.
Answer:
Bharatpur

Question 5.
For early man, forests were a source of ______ and ______
Answer:
food and shelter

B. Match the following.

Column I	Column II
1. resins	(a) cutting down of trees
2. forests	(b) adhesives
3. deforestation	(c) soil conservators
4. aswagandha	(d) paint
5. gums	(e) medicinal plant

Answer:

Column I		Column II
1. resins	d	(a) cutting down of trees
2. forests	c	(b) adhesives
3. deforestation	a	(c) soil conservators
4. aswagandha	e	(d) paint
5. gums	b	(e) medicinal plant

C. Tick (✓) the correct option.

1. The leaf, used to make disposable plates, is the
(a) tendu leaf
(b) areca nut leaf
(c) amla leaf
(d) brahmi leaf
Answer:
(b) areca nut leaf

2. Deforestation results in
(a) soil erosion
(b) flood
(c) low rainfall
(d) all of the above
Answer:
(d) All of the above

3. Bee wax is used to make
(a) spices
(b) varnish
(c) medicine
(d) adhesive
Answer:
(c) medicine

4. Which of the following is not a forest product?
(a) gum
(b) timber
(c) aswagandha
(d) kerosene
Answer:
(d) kerosene

5. If forests disappear, the amount of
(a) carbon dioxide, in air, will decrease
(b) oxygen, in air, will increase
(c) carbon dioxide, in air, will increase
(d) nitrogen, in air, will increase
Answer:
(c) carbon dioxide, in air, will increase

D. Answer the following Questions in brief.

Question 1.
Name any four products that are obtained from forests.
Answer:
Wood, Medicinal plants, Spices and Gum.

Question 2.
Why do some men cut trees?
Answer:
Some men cut trees for their own selfish interests.

Question 3.
What is the Gir National Park famous for?
Answer:
Asiatic Lion.

Question 4.
Name two migratory birds that visit Bharatpur Bird Sanctuary.
Answer:
Siberian crane and Pelican.

Question 5.
What is the average temperature and annual rainfall needed for a forest to develop?
Answer: Temperature
of more than 10°C and minimum rainfall of 200 mm.

E. Answer the following Questions.

Question 1.
List four harmful effects of deforestation.
Answer:
Harmful Effects of Deforestation

Reduced rainfall in the surrounding area.
Increased levels of carbon dioxide which causes global warming.
Decreased level of groundwater which results in shortage of drinking water.
Increase in soil erosion which results in more frequent floods.

Question 2.
How do forests prevent soil erosion?
Answer:
Roots of trees bind the topsoil. This prevents soil erosion.

Question 3.
State the importance of forests to human beings.
Answer:
We get many products from forests; like wood, medicinal plants, honey, wax, resin, etc. Forests help in recharging the groundwater. Forests
prevent soil erosion. Forests soak up carbon dioxide and release oxygen. Thus, forests maintain the balance in our environment.

Question 4.
Why are forests known as the ‘lungs of the earth’?
Answer:
Forests soak up excess carbon dioxide from the atmosphere and release carbon dioxide. This is similar to the way our lungs work while removing carbon dioxide from the blood. Hence, forests are known as the ‘lungs of the earth’.

Question 5.
ow can we contribute towards protection of forests?
Answer:
We can contribute in following ways to conserve forests:

Minimise the use of wood and wood products.
Do not use products which promote destruction of forests. Do not use fur because fur is obtained from animals. Do not use items made of ivory.
We should plant new trees and celebrate Van Mahotsava.

Value Based Questions.

Question 1.
Who do you think had made the better choice of purchasing the gifts – Ridhi or her mother?
Answer:
Ridhi’s mother made the better choice of purchasing the gifts. Ridhi was also motivated by her mother to do the same.

Question 2.
Make a list of five things, used at home or school, made from wood.
Answer:
Table, chair, rolling pin, sofa and door.

Question 3.
Suggest two ways by which every person can contribute towards forest conservation.
Answer:
Two ways by which every person can contribute towards forest conservation:
(a) By avoiding buying wooden items.
(b) By saving paper.

Something To Do

Question 1.
Visit a national park or a wildlife sanctuary and prepare a list of ten plants and ten animals that you see there. Are these plants and animals present in the area where you live? What could be the reason?
Answer:
Do it yourself.

Question 2.
Given below is a poem about how human activities can be harmful to the environment. Read this poem and write down five harmful activities of humAnswer: Suggest some ways by which we can stop and reverse the harmful effects.

“The world is finite, resources are scarce,
Things are bad and will be worse,
Coal is burned and gas exploded,
Forests cut and soil eroded,
Wells are dry and air polluted,
Dust is blowing, trees are uprooted,
Oil is going, ores depleted,
Drains receive what is excreted,
Land is sinking, seas are rising,
Man is far too enterprising,
Fires will rage with man to fan it,
Soon we will have a plundered planet.”
—K. E. Boulding
Answer:
Five harmful activities of humans:

Burning of coal
Cutting of trees
Oil is exploited
Ores are overused
Water is being polluted

Some ways to stop and reverse the harmful effects:

Planting new trees
Save paper
Conserve minerals
Conserve environment

DAV Class 5 Science Chapter 3 Solutions – Forests

I. Multiple Choice Questions (MCQ)

1. Which forest produce is used for making paper?
(a) Wood
(b) Gum
(c) Resin
(d) Tendu
Answer:
(a) Wood

2. What is the use of gum?
(a) As dye
(b) As medicine
(c) As adhesive
(d) As ornament
Answer:
(c) As adhesive

3. Which plant is used for making baskets, boats, bridges, buckets, fishing rod, musical instruments, etc.?
(a) Banyan
(b) Areca nut
(c) Tendu
(d) Bamboo
Answer:
(d) Bamboo

4. Leaves of which plant are also called green gold in Odisha?
(a) Tendu
(b) Bamboo
(c) Eucalyptus
(d) Banana
Answer:
(a) Tendu

5. The Forest Conservation Act was passed in which year?
(a) 1970
(b) 1980
(c) 1990
(d) 2000
Answer:
(b) 1980.

II. Fill in The Blanks

Question 1.
Lack of forests can result in ______ erosion.
Answer:
soil

Question 2.
Aswagandha is an example of ______ plant.
Answer:
medicinal

Question 3.
Areca nut leaves are used for making ______
Answer:
disposable plates

Question 4.
Bees’ ______ is used in making cosmetics and medicines.
Answer:
wax

Question 5.
The Asiatic Lions are found in ______ National Park.
Answer:
Gir.

III. Write True/False

1. More than 200 mm rainfall is reuired for forests.
2. Forests provided shelter and food to early man.
3. Siberian Cranes arrive at Corbett National Park.
4. Deforestation results in reduced rainfall in the affected area.
5. Gir National Park is in Gujarat.
Answer:
1. More than 200 mm rainfall is reuired for forests. (False)
2. Forests provided shelter and food to early man. (True)
3. Siberian Cranes arrive at Corbett National Park. (False)
4. Deforestation results in reduced rainfall in the affected area. (True)
5. Gir National Park is in Gujarat. (True)

IV. Define The Following

Question 1.
Forest
Answer:
An area with high density of trees is called forest.

Question 2.
Deforestation
Answer:
Large scale cutting of forests is called deforestation.

Question 3.
Afforestation
Answer:
Recovering forest cover by planting trees is called afforestation.

Question 4.
Global Warming
Answer:
General increase in earth’s temperature is called global warming.

Question 5.
Soil Erosion
Answer:
Removal of topsoil is called soil erosion.

V. Answer the Following Questions in one word

Question 1.
Which gas is the main cause of global warming?
Answer:
Carbon dioxide

Question 2.
What is the minimum annual rainfall required for forests to develop?
Answer:
200 mm

Question 3.
Which forest produce is widely used in making furniture?
Answer:
Wood

Question 4.
The Siberian cranes arrive in which bird sanctuary in India?
Answer:
Bharatpur Bird Sanctuary

Question 5.
Which mahotsava is celebrated to increase awareness about forest conservation?
Answer:
Van Mahotsava

VI. Answer the Following Questions

Question 1.
How does forest purify the air?
Answer:
Trees in forests take up carbon dioxide and release oxygen. Thus, forests purify the air and maintain the balance in the climate.

Question 2.
How do trees help in recharging the groundwater?
Answer:
Roots of trees help the ground in soaking rainwater. This helps in recharging the groundwater.

Question 3.
What are the various uses of bamboo?
Answer:
Bamboo is used for various purposes; like making baskets, boats, bridges, buckets, cooking utensils, fishing rods, musical instruments, handicrafts, paper, furniture, toy, umbrella and walking stick. Bamboo is also used as food.

Question 4.
What the various reasons of deforestation?
Answer:
Following are some reasons of deforestation:

More land is needed to make houses, industries and for farming.
Wood is required for construction.
Trees are also cut for making many products but new trees are not planted.

Question 5.
What do you understand by National Park?
Answer:
It is a reserved land which is usually owned by the national government. No human activity is allowed in it. It receives a bigger financial support from the government.