RBSE Solutions for Class 7 Science Chapter 16 Forest and Wild Life

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RBSE Solutions for Class 7 Science Chapter 16 Forest and Wild Life are part of RBSE Solutions for Class 7 Science. Here we have given Rajasthan Board RBSE Class 7 Science Chapter 16 Forest and Wild Life.

Board RBSE
Textbook SIERT, Rajasthan
Class Class 7
Subject Science
Chapter Chapter 16
Chapter Name Forest and Wild Life
Number of Questions Solved 52
Category RBSE Solutions

Rajasthan Board RBSE Class 7 Science Chapter 16 Forest and Wild Life

Text book Exercise

Choose the most appropriate option

Question 1.
What are the advantages of forests to us :
(a) Improves ground water level
(b) Controls environmental temperature
(c) Improves fertility of land
(d) All of the above
Answer:
(d) All of the above

Question 2.
Disadvantage of deforestation is:
(a) Increase in soil erosion
(b) Decrease in soil erosion
(c) Increase in number of wild life
(d) Increase in rain
Answer:
(a) Increase in soil erosion

Question 3.
State flower and tree of Rajasthan are:
(a) Roheda and Khejri
(b) Jail and Roheda
(c) Roheda and Neem
(d) Lotus and Banyan
Answer:
(a) Roheda and Khejri

Question 4.
State bird of Raj asthan is:
(a) Pigeon
(b) Peacock
(c) Great Indian Bustard
(d) Parrot
Answer:
(c) Great Indian Bustard

Match the Columns 1 and 2:

Sr. No. Column-1 Column-2
a. Ranthambore National Park (i) Pratapgarh District
b. Keoladeo National Park (ii) Sirohi District
c. Sitamata Sanctuary (iii) Bharatpur District
d. MountAbu Sanctuary (iv) SawaiMadhopur District

Answer:
a. (iv), b. (iii), c. (i), d. (ii)

Fill in the blanks :   
1. Large area of land covered by trees inhabited by wild life is called……………
2. Forest prevents……………..
3. A forest is a habitat for…………………
4. For wild life conservation National Parks and …………. were established.
Ans:

  1. forest
  2. soil
  3. wild life
  4. sanctuaries.

Short Answer Type Questions :

Question 1.
Write down the causes of Deforestation.
Answer:
Causes of Deforestation

  1. To meet up the requirements of even increasing population, urbanisation, homes, for industrialisation, extra land is required for establishment of industries and factories, forests are being cut indiscriminately in an unplanned manner.
  2. Forest are also being cleared (cut) for Dams, Construction of roads, mining, river-valley projects.
  3. The demand of wood by industries as a fuel and for making windows frames and doors etc. are the main reasons of indiscriminate cutting of forests (deforestation).

Question 2.
Write down the disadvantages of deforestation.
Answer:
The disadvantage of over exploitation of forest wealth are as follows.

  1. Damaging environmental balance.
  2. Decrease in rain fall
  3. Increase in soil erosion.
  4. Increase in temperature of the environment.
  5. Decrease of water level.
  6. A growth in loss of biodiversity due to decreasing number of wild life and their species.
  7. A decrease in the growth of forest
  8. An increase in floods, droughts, infertility of soil, natural disasters and of desert area, are some of the main disadvantages of deforestation.

Question 3.
Write down the advantages of forests.
Answer:
The advantages of forests are:

  1. Forests provide various types of wood for domestic, commercial and industrial use.
  2. We obtain medicines from herbs and important commercial forest products Such as Ruber, Wax, Bamboo, Grasses, Fodder, Catechu and Resins etc.
  3. Forests reduce sound and other types of pollution.
  4.  Forests are the best habitat for animals and birds and many other organisms.
  5. Forests increase natural beauty.
  6. Maintain moisture content of the air.
  7. Increase fertility of the soil.
  8. They help in increase ground water table and soil moisture content.
  9. Prevents soil erosion.
  10. Forests provide life giving oxygen, which makes our environment clean.

Question 4.
Write down the names of some major wild life species of Rajasthan.
Answer:

  1. Tiger
  2. Leopard
  3. Jarakh
  4. Wolf
  5. Fox
  6. Jackal
  7. Wild bore
  8. Dear
  9. Black buck
  10. Blue-bull
  11. Chital
  12. Sambhar
  13. Rabbit
  14. Sea Sehi (crested porcupine) etc.

Long Answer Type Questions

Question 1.
Write down your suggestions for forest conservation.
Answer:
We should try to conserve (to keep safe) forest in the following ways:

  1. Plant more and more trees means continuous plantation.
  2. Appropriate management should be done to protect forests from fire.
  3. Appropriate measures should be taken to protect plants/trees from various types of diseases.
  4. Public awareness programmers should be enhanced,, evoked and inspired through different activities.
  5. Strict action should be initiated against those who are indulged in illegal cutting of forests.
  6. We should ensure participation of each and everyone to conserve forest.
  7. The laws in-acted by Government, courts and constitutional bodies should be strictly implemented.
  8. Wildlife conservation and forest conservation week should be arranged with enthusiasm.

Question 2.
Write about keoladeo and Ranthambore National park.
Answer:
(1) Keoladeo National Park: It is a worlds famous National Park situated south-east of Bharatpur. This national park is a shelter place for worlds most spectacular water birds. This national park is situated at the Junction of two rivers, the Ban Ganga and Gambhiri. Formerly, was known as Ghana Birds Sanctuary. Several species of Indian birds are found here. Migratory birds like Siberian Crane and Jal Murgi (water birds) visit this national park in specific season

(2) Ranthambore National Park: This national park is spread all around the historical fort Ranthambore in many square kilometers of area, near Sawai Madhopur. Project tiger is launched here to prevent the decreasing number of Tigers. Tigers, Jackal, Leopards, blue-bull, deer, wild bore and sambhar are found in large number in this park. The project tiger is an ambitious project launched by Government of India for conservation of tigers.

Question 3.
Draw a figure of wild animal of your choice.
Answer:
Students should draw a figure of wild animal by their own choice.
RBSE Solutions for Class 7 Science Chapter 16 Forest and Wild Life 1

Question 4.
What would be the impact if forests were non existant? Explain in detail.
Answer:
Followings would be bad effects, if forests were non existant.

  • We would not have been able to obtain wood for domestic, commercial and industrial purposes along with medicinal plants and herbs and the forest products of commercial importance like rubber, wax, bamboo, grasses, fodder, catechu and resins etc.
  • Forests enhance the beauty of nature and are the best place (habitat) for birds and wild life. Wild life would become adversely affected. They would become extinct most become endangered.
  • Forest controls, the climatic condition and brings down the temperature of the place. If there had not been forest, the humidity of air would have decreased and temperature would have increased.
  • Trees in forest reduce the flow of water and allow water of percolate in to the ground as a result water table increases, had there been no forest, the level of water in ground would have decreased.
  • The erosion of soil increase in absence of forest cover.

Activity

Question 1.
Find out some medicinal plant of local forest area by surveying and interviewing the local Ayurvedic Practitioner (Vaidhya, Hakims and Guru) and document their effects and scientifically test the local traditional knowledge. By contacting Central Drug Laboratory discover the science behind local traditional knowledge.
Answer:
Under guidance of your teacher survey the uses of these plants of medicinal importance. Know the importance of these medicinally important plants by interviewing local Vaidhyas, Hakims and intellectuals. After gaining knowledge test it scientifically.

For your work you may contact Central Aushadhi Laboratory. For your help a list of medicinal plants found in the forest of Rajasthan is given below:

  1. Chirmi
  2. Pili Kateli (Satyanasi)
  3. Neem
  4. Akara
  5. Dhatura
  6. Sarphanko
  7. Rukhari
  8. AadhaShishi

Question 2.
Study the impact of local pesticides or pest control methods such as neem leaves, havan of benzom (Guggal), akada (Calatropes) etc on mosquitoes or other insects on the basis of community dialogue and survey and compare them with modem insecticides.
Answer:
Talk to people of your community and based on your survey on locally available insecticides or methods used to control pests and study the impact of local insecticides on insects like mosquitoes and other insects.

On comparing these traditional insecticide with those of chemical insecticides, you will find, that traditional insecticides are available in your surroundings, they are cheaper and cause less harm to man, animals and to the environment. On the other hand chemical insecticides are costly and cause great harm, to man, animals and environment. Infact chemical insectides major main cause of environmental pollution.

Question 3.
Prepare a Tabular chart to exhibit Wild Life Sanctuaries located in Rajasthan, their districts and the names of wild animals which falls under conservation.
Answer:

S.No. Sanctuaries District Conserved Animals
1. Sariska Sanctuary Alwar Tiger, Leopard, Neelkanth Jarakh, Sparrow, Chinkara Sambar, Chital, Chinkara, Blue-bull, Wild Pig, Partridge Gray Partridge, Sunbird.
2. Tal Chhapar Sanctuary Chum Black buck, Chinka, Demojal Saras (Crane) etc.
3. Sitamata Sanctuary Chittorgarh Flying squirrel, Jarakh, Bear wild peg. Wolf, Sambar, Blue-bull.
4. Van-Vihar Sanctuary Dholpur White Siberian crane, Bear Leopard, Jarakh, and hens etc.
5. Chambal Sanctuary Kota Crocodile, Tortoise etc.
6. Jaisamand Sanctuary Udaipur Leopard, Chital, Chinkara, Pig. Rojda etc.
7. Raoli Tadgarh Sanctuary Ajmer, Pah, Udaipur Bear, Leopard, Jarakh, Blue Bull, Jackal etc.
8. Bhainsroad Sanctuary Chittorgarh Crocodile

InText Questions

Question 1.
Write down the names of plants and animals in surrounding your in names of table given below.
(Page 158)
Answer:
Names of plants and animals found in our surrounding:

s. No.

 Name of Trees/Plants

Name of Animals
1. Roheda Deer
2. Khejri Tree Jackal
3. Pilu(Khumbhi) Blue-bull (Nilgai)
4. Babul (Keekar) Chinkara
5. Kair Chital
6. Akola Rabbit
7. Ber (Indian Jujube) Langur (Baboon)
8. Neem Tree Monkey

Question 2.
You might have visited forms, mountains and other natural places. Make a list of animals and plants you might have seen there: (Page 162)
Answer:
List of animals and plants :

S. No. Name of Place (Location) Name of Animals Name of Plants
1. Field Deer, Sambar deer, Blue bull Maize, Sorghum
2. Mountain (Hills) Black buck Khejri
3. Ranthambore National Park Bear, Tiger Wheat
4. Sariska Wild Life Sanctuary Tiger Millet, Wheat
5. Keoladeo National Park Siberian Crane, Heron, Water fowl Mustard, Groundnut
6. Van Vihar Wild Life Sanctuary, Dholpur White Siberian Crane Bhagera, Jarakh, Hen Lemon, Mango
7. Udaipur Deer Mango, Guava
8. Kota Leopard Grapes, Mango
9. Bharatpur Four homed antilope Wheat, Mustard

Other Important Questions

Multiple Choice Questions

Question 1.
Which one of the following is not a function of forest ?
(a) To reduce sound pollution
(b) To maintain humidity of air
(c) To Reduce soil erosion
(d) Environmental pollution
(d) Environmental pollution

Question 2.
The main function of humus is:
(a) To increase fertility of soil
(b) Soil erosion
(c) To pollute air
(d) To pollute water
Answer:
(a) To increase fertility of soil

Question 3.
Which is not disadvantage of deforestation ?
(a) To disturb environmental balance
(b) Increase in soil erosion
(c) To reduce rainfall
(d) Depletion of ozone layer
Answer:
(d) Depletion of ozone layer

Question 4.
In which District, Mount Abu is situated ?
(a) InBharatpur
(b) In Jaipur
(c) In Jalore
(d) hi Sirohi
Answer:
(d) hi Sirohi

Question 5.
The famous Indian ornithologist is:
(a) Dr Salim Ali
(b) Hargovind Khurana
(c) Jagdish Chandra Basu
(d) Homi Jehangir Bhabha
Answer:
(a) Dr Salim Ali

Fill in the blanks :

  1. Removal of upper layer of soil is called……
  2. For conservation of forest…………. of more and more tree is necessary.
  3. Keoladeo National Park is situated in………
  4. Rajasthan Government deleared camel a state animal on………………..

Answer:

  1. erosion
  2. plantation
  3. Bharatpur
  4. 1st July, 2014.

Very Short Answer Type Questions

Question 1.
What is forest ?
Answer:
A large area of land covered with trees where wild life is called forest.

Question 2.
What is humus ?
Answer:
The dead and decomposed organic matter present in the upper layer of soil is called humus.

Question 3.
What are the main reasons of deforestation ?
Answer:
Indiscriminate (unplanned) cutting of forest to meet up the demand requirement of wood for fuel, industries and for making window, door, frames etc. is the main reason of deforestation.

Question 4.
What are the most important measures for forest conservation ?
Answer:
Intensive plantation programmes are the most important measure of forest conservation.

Question 5.
Why were National Parks and Sanctuaries established ?
Answer:
National Parks and Sanctuaries were established for conservation, development and management of wild life.

Question 6.
Where in Rajasthan the Project Tiger, was launched?
Answer:
The Project tiger was launched at Ranthambore National Park, Sawai Madhopur in Rajasthan.

Question 7.
Which wild animals are mainly found in Sitamata, sanctuary Pratapgarh ?
Answer:
Blue bull (Nilgai) Sambhar, Chital, wild cat and fox etc.

Question 8.
Write the names of four wild animals found in Rajasthan.
Answer:

  1. Tiger
  2. Leopard (Baghira)
  3. Jarakh

Question 9.
Which Sanctuary is famous for black buck?
Answer:
Talchhapar Sanctuary, Churn.

Question 10.
State animals Chinkara and Camel are animals of which category ?
Answer:
Chinkara is an animal of wild life category while camel is an animal live stock category.

Short Answer Type Questions

Question 1.
Why do we feel cool in forests ?
Answer:
There are many small pores present on the surface of plant leaves. These pores are called stomata. Water come out in the form of water vapours from these stomata (transpiration). Due to this the moisture content of the air increases. This is called humidity.Due to plants and trees the humidity increases, that is why we feel cool in forest.

Question 2.
How do forests increase the fertility of the soil?
Answer:
In forest old leaves and branches fall on the ground. The micro organisms (bacteria) present in the soil decompose them. Due to which a layer of decomposed matter deposits on the surface of the soil, which we call Humus. Humus is a high quality manure, which increases the fertility of the soil.

Question 3.
What is soil erosion? How do you prevent it?
Answer:
Rain and storms (strong winds) carry away the upper fertile surface of the soil. This removal of top surface of the soil by rain and winds is called soil erosion. In forests, the roots of trees hold the soil around it tightly due to which fertile soil is not removed by air or water current.

Question 4.
How do forests contribute (help) in retaining soil moisture and ground water level ?
Answer:
Due to the humus formed by plants in forests, rain water seeps in to the ground slowly, which maintains constantly moisture in the soil and sufficient water is available to the plants. Forests reduce flow of water current giving sufficient time to the soil to absorb water which increase the ground*water level.

Question 5.
Why is it necessary to conserve forests now a days ?
Answer:
Forests are most important to us. Destruction of forest due to its over-exploitation and deforestation is a matter of concern. Forest plays important role in maintaining balance of environment. Therefore conservation of forest and reforestation is very necessary at present.

Question 6.
Name the main wild life sanctuaries of Rajasthan.
Answer:

  1. Ramgarh Vishdhari wild life Sanctuary, Bundi.
  2. Nahargarh wild life Santuary, Jaipur.
  3. Sitamata wild life sanctuary, Pratapgarh.
  4. Talchhaper wild life sanctuary, Churn.
  5. Mount Abu Sanctuary, Sirohi.

Question 7.
Write the names of species of deer found in Rajasthan.
Answer:
The main species of deer foil in Rajasthan are chinkara, black buck, four homed antilope (chausingha deer) etc. Two main species of genus deer are sambar and chital.

Question 8.
Write the sub-names of Neelgai.
Answer:
Neelgai is also known by other names such as Rojh and Rojda. It is a heavy and strong, bluish grey coloured wild animal like horse. It is found moving in Jungles. Plains and crop fields, causing heavy damage to the agriculture.

Question 9.
Name the birds which are found in Rajasthan.
Answer:
In Rajasthan, International birds, white crane (Siberian Saras), National bird Peacock, and state bird Godawan are found roamings. In addition to these birds, other birds like koels, sparrow, neelkanth and Indian saras are also found.            ’

Question 10.
Write the names of the books written by the famous Indian ornithologist (Birds Scientist) Dr Salim Ali aslo called Birds man of India.
Answer:

  1. The book of Indian Birds
  2. Hand Book of the Birds of India and Pakistan
  3. The Fall of a Sparrow.

Long Answer Type Questions

Question 1.
Classify the wild life (animals) found in Rajasthan.
Answer:
The wild life found in Rajasthan can be classified in to following groups:

  1. Carnivores – Tiger, Jackal, Wolf, Leopard, Jarakh, Fox, Wild dog, Mongoose (Newak), Desert cat and Van Bilas.
  2. Herbivores – Deer, Sambar, Nilgai, chinkara chital, four homed deer, Bear, Wild bore, Rabbit, Langin (Baboon) and Monkey.
  3. Reptile Animals – Python, Patagoh, Crocodile, Nag, Sand, Cobra, Gharial (Aligator) etc.
  4. Animal feeding by cutting – Squirrels, Rats sihiandgerbils.

Question 2.
Write a briefly note on the life of Dr. Salim Ali, the famous Indian ornithologist (Birds scientist).
Answer:
Dr. Salim Ali was born on 12th November 1896 in Bombay now known as Mumbai. He was an Indian ornithologist and naturalist. He is also known as Indian, Birdsman. He we the first Indian to conduct systematic birds survey across India and wrote many books on birds that helped popularised ornithology of India. He devoted 65 years on the survey on birds. He is also known a moving Encyclopedia. His book based on birds are : The books of Indian Birds, The fall of a sparrow, Hand book of birds of India and Pakistan. He was awarded with second highest civilian Award ‘The Padam Vibhusan and many other Awards by Government of India were conferred to him for his work done or Indian Bird and natural science.

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