Class 6 Science NCERT Solutions for Chapter – 9 The Living Organisms and their Surroundings

The Living Organisms and their Surroundings

Question 1.
What is a habitat ?

Answer:
The surroundings where plants and animals live, is called their habitat.

Question 2.
How are cactus adapted to survive in a desert ?

Answer:
The adaptive features of cactus to survive in a desert are :

  1. The leaves of cactus plants are in the shape of spines which helps in reducing loss of water from leaves through transpiration.
  2. The stem is leaf-like to carry photosynthesis.
  3. The stem is covered with a thick waxy layer, which helps to retain water.
  4. Their roots go very deep into the soil for absorbing water.

Question 3.
Fill up the blanks :

(a) The presence of specific features, which enable a plant or an animal to live in a particular habitat, is called _______.
Answer:
Adaptation

(b) The habitats of the plants and animals that live on land are called _______ habitat.
Answer:
Terrestrial

(c) The habitats of plants and animals that live in water are called _______ habitat.
Answer:
Aquatic

(d) Soil, water and air are the _______ factors of a habitat.
Answer:
Abiotic

(e) Changes in our surroundings that make us respond to them, are called _______.
Answer:
Stimuli

Question 4.
Which of the things in the following list are non living ?
Plough, Mushroom, Sewing machine, Radio, Boat, Water hyacinth, Earthworm

Answer:

  • Plough
  • sewing machine
  • Radio
  • Boat are nonliving.

Question 5.
Give an example of a non-living thing, which shows any two characteristics of living things.

  • Moving of bus or car – Movement is characteristics of living things.
  • Growing in size of clouds – Growth is characteristics of living things.

Question 6.
Which of the non-living things listed below, were once part of a living thing?
Butter, Leather, Soil, Wool, Electric bulb, Cooking oil, Salt, Apple, Rubber.

Answer:

  • Butter
  • Leather
  • Wool
  • Cooking oil
  • Apple
  • Rubber are non-living things which were once part of a living thing.

Question 7.
List the common characteristics of the living things.

Answer:
The common characteristics of the living things are :

  1. They all need food.
  2. They all show growth.
  3. They all respire.
  4. They all respond to stimuli.
  5. They all reproduce their own kind.
  6. They all move.

Question 8.
Explain, why speed is important for survival in the grass lands for animals that live there.

(Hint: There are few trees or places for animals to hide in grass lands habitats.)

Answer:
Speed of animals in the grass lands helps them to run away from the predators.

InText Questions and Answers

Activity 1

Think of the plants, animals and other objects found in different surroundings and write in the table giver below Table 9.1 Animals, plants and other objects found in different surroundings:

In forestOn mountainsIn desertIn seaAny other, Pond and Lakes

Answer:

In forestOn mountainsIn desertIn seaAny other, Pond and Lakes
LionMountain GoatsCamelsCrabFrog
DeerYakSnakesFishesHydrilla
ElephantSnow leopardsDesert ratsSaline waterWater lily
TigerPine treesLizardsAlgaeWater- hyacirth
RhinocerosInsectsCactusSea weedsLotus
MonkeyAcaciaCoralsFresh water
Neem TreeAgavaStarfishSnails
Baniyan TeaOpuntiaUrchinsInsects
InsectsBar
GrassInsects
Birds
Butterflies

Activity 2

Collect some dry moong seeds. Keep a small heap of seeds aside and soak the rest in water for a day. Divide the soaked seeds into four parts. Keep one part completely submerged in water for 3-4 days. Do not disturb the dry seeds and those submerged in water. Keep one part of soaked seeds in a sunny room and another in a completely dark region like a cupboard that does not allow any light to come in. Keep the last part in very cold surroundings, say, in a refrigerator or with ice around them. Set these three parts to germinate by rinsing them and draining the water every day.

Now answer the following questions :

Question 1.
What do you notice ?

Answer:
We notice that some plants start germinating.

Question 2.
Do the seeds in all the five parts germinate equally ?

Answer:
No.

Question 3.
Do you find slower or no germination in any of these ?

Answer:
Yes, the dry moong seeds do not germinate.

Question 4.
Do you find that abiotic factors like air, water, light and heat are very important for growth of plants ?

Answer:
Yes.

Activity 3

Bring a potted cactus and a leafy plant to the classroom. Tie polythene bags to some parts of the two plants. Leave the potted plants in the sun and observe after a few hours.

Now answer the following questions :

Question 1.
What do you see ?

Answer:
We see drops of water have collected on the two polythene bags.

Question 2.
Do you notice any difference in the amount of water collected on two polythene bags ?

Answer:
Yes, water collected in leafy plant is more than water collected in cactus.

Activity 4

Place a potted plant in a room a little away from a window through which sunlight enters some time during the day (Fig. 9.1). Continue watering the plant for a few days.
NCERT Solutions for Class 6 Science img 22

Now answer the following question :

Question 1.
Does the plant grow upright, like plants out in the open ? Note the direction in which it bends, if it is not growing upright. Do you think, this may be in response to some stimulus ?

Answer:
No, the plant does not grow upright, like plants out in the open. It bends towards the window from where light is coming. Yes, it is response to light.

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