Class 7 NCERT Solutions for Social Science (Geography) Chapter – 6 Natural Vegetation and Wild Life

Natural Vegetation and Wild Life

Text Book Page No. 39

Let’s find

Question 1.
Now can you tell why Salami saw changes in the natural vegetation as she climbed higher and higher? What type of vegetation as did she see in the Himalayas starting with the foothills and going to the higher altitudes?

Answer:
Salami saw changes in the natural vegetation as she climbed higher, and higher due to change in height, and climatic (temperature, precipitation) changes. At the foothills, Salami saw deep jungles of Sal and teak. As she went higher, she could see coniferous trees on the mountain slopes. And still at higher altitudes, land was covered with short grass and snow.

Text Book Page No. 40

Question 1.
The tropical evergreen forest in Brazil is so enormous that they are like the lungs of the earth : Can you tell why?

Answer:
Evergreen forests are like the lungs of the earth because the way lungs provide oxygen to our body, in the same way, these forests provide oxygen to the atmosphere and maintain its appropriate balance.

Text Book Page No. 41

Let’s do

Question 1.
Where in India do tropical evergreen and tropical deciduous forests occur? Name the states.

Answer:
(1) Tropical evergreen forests :
(a) In Western Ghats the regions receiving heavy rainfall like Maharashtra and Goa
(b) Lampshade
(c) Andaman and Nicobar Islands
(d) Upper regions of Assam and
(e) Coastal Tamil Nadu

(2) Tropical deciduous forests :
(a) Assam
(b) Jharkhand
(c) Orissa
(d) Chhattisgarh
(e) Coastal Andhra
(f) Tamil Nadu

Text Book Page No. 43

Let’s do

Question 1.
Look around in your surroundings and find out the articles made up of hard wood and soft wood.

Answer:
Articles made up of hard wood :

  1. Table
  2. Chair
  3. Doors
  4. Windows
  5. Boxes and
  6. Building material

Articles made up of soft wood :

  1. Notebook and
  2. Matchbox

Question 2.
Find out and learn few names of trees of your locality.

Answer:

  1. Mango
  2. Neem
  3. Peepal
  4. Banyan
  5. Guava
  6. Ashoka
  7. Eucalyptus
  8. Banana

Exercise Questions and Answers

Question 1.
Answer the following questions :

(1) Which are the two factors on which the growth of vegetation mostly depends?
Answer:

Two factors on which the growth of vegetation depend are :

  1. Temperature
  2. Moisture

(2) Which are the three broad categories of natural vegetation?
Answer:

  1. Forests
  2. Grasslands
  3. Thorny shrubs and scrubs

(3) Name the two hardwood trees commonly found in tropical evergreen forest.
Answer:

  1. Rosewood
  2. Ebony

(4) In which part of the world tropical deciduous forest is found?
Answer:

Tropical deciduous forests are found in the large part of India, northern Australia and in central America. .

(5) In which climatic conditions, citrus fruits are cultivated?
Answer:

Climatic conditions for cultivation of citrus fruits :

  1. Hot dry summers
  2. Rainy mild winters

(6) Write the uses of coniferous forest.
Answer:

(a) Wood is used to make pulp, which is useful for making paper and newsprint.
(b) To make matchbox
(c) To make packing box
(d) Decorative pieces

(7) In which part of the world seasonal grassland is found?
Answer:

Seasonal grasslands are found in the mid-latitudinal zones and in the interior parts of the continents.

Question 2.
Tick the correct answer :

(1) Mosses and Lichens are found in :
(a) Deserter vegetation
(b) Tropical evergreen forest
(c) Tundra vegetation
Answer:
(c) Tundra vegetation

(2) Thorny bushes are found in :
(a) Hot and humid tropical climate
(b) Hot and dry deserter climate
(c) Cold polar climate
Answer:
(b) Hot and dry deserter climate

(3) In tropical evergreen forest, one of the common animals is :
(a) Monkey
(b) Giraffe
(c) Camel
Answer:
(a) Monkey

(4) One important variety of coniferous forest is :
(a) Rosewood
(b) Pine
(c) Teak
Answer:
(b) Pine

(5) Steppe grassland is found in :
(a) S. Africa
(b) Australia
(c) Russia
Answer:
(c) Russia

Question 3.
Match the following :

WalrusSoft wood tree
CedarAn animal of tropical deciduous forest
OlivesA polar animal
Elephants grasslandTemperate in Australia
CamposA citrus fruit
DownsTropical grassland of Brazil

Answer:

WalrusA polar animal
CedarSoft wood tree
OlivesA citrus fruit
Elephants grasslandAn animal of tropical deciduous forest
CamposTropical grassland of Brazil
DownsTemperate in Australia

Give reasons 

Question 4.

(1) The animals in polar region have thick fur and thick skin.
Answer:

To protect themselves from the cold climatic conditions.

(2) Tropical deciduous trees shed their leaves in the dry season.
Answer:

To conserve water.

(3) The type and thickness of vegetation changes from place to place.
Answer:

Because of the variation in temperature, moisture, slope and thickness of soil.

For Fun

Question 1.
(1) Collect pictures and photographs of forests and grasslands of different parts of world. Write one sentence below each picture.
(2) Make a collage of rain forest, grass-land and coniferous forests.

Answer:
Students do themselves.

Activity

Question 1.
In the given crossword table 55 words are hidden. They are all about vegetation and wildlife and are to be found horizontally and vertically. Two have been worked out for you. Work in pairs with a friend.

Answer:

NCERT Solutions for Class 8 Social Science geography 6 img 1