DAV Class 6 Science Chapter 1 Solution

DAV Class 6 Science Chapter 1 Solution: If you are looking for the Solution of DAV class 6 Science the Living World book Chapter 1 Our Environment, then you are at right place. Here we provide complete solution of DAV class six The Living World science book.

DAV Class 6 Science Chapter 1 Solution

Highlights

• A. Fill in the blanks.
• B. True or False.
• C. Tick the correct option.
• D. Answer the following questions in brief.
• E. Answer the following questions.

A. Fill in the blanks.

1. Plastic is ___________ as it cannot be broken down into simpler substances in nature.

2. We must say ‘No’ to ___________ and use ___________ or ___________.

3. The flowers of the ___________ bloom with sunrise and close after sunset.

4. ___________ and ___________ are among the animals found only in cold regions.

5. ___________ and ___________ processes help in balancing of carbon dioxide and oxygen in the atmosphere.

Answer: (1) non-biodegradable (2) plastic, paper, or cloths (3) ipomoea (4) Polar bear, Penguins (5) Respiration, photosynthesis

B. Write True or False for the following statements.

1. Herbivores can prepare their own food.

2. Fungi and bacteria are organisms that can be easily seen by the human eye, by itself.

3. The sunflower faces the east in the morning.

4. Camels do not have sweat glands.

5. Soil is an important biotic component of our environment.

Answer: (1) False (2) False (3) True (4) True (5) False

C. Tick the correct option.

Answer:

1. producers, consumers as well as decomposers

2. autotrophs

3. bacteria as well as fungi

4. aluminium foil

5. worms

6. camel

D. Answer the following questions in brief.

1. Why should we segregate different types of wastes?

Answer: We segregate different types of wastes because of their disposal in eco-friendly way in our environment.

2. Write the meaning of the term ‘vermicomposting

Answer: process of composting with the help of various suitable worms, like the redworms and other earthworms.

3. Which component of air gets ‘used-up’ during the process of photosynthesis?

Answer: Carbon dioxide is used up during the process of photosynthesis.

4. Suggest any five activities that can help to save the environment.

Answer:

5. How does nature maintain a balance, between the amounts of oxygen and carbon dioxide, in the atmosphere?

Answer: Nature maintains a balance, between the amounts of oxygen and carbon dioxide, in the atmosphere by the two processes i.e., breathing and photosynthesis.

E. Answer the following questions.

1. Distinguish between

(a) autotrophs and heterotrophs

Answer:

(b) decomposers and scavengers

Answer:

Decomposers

(1) There are some organisms which derive their food from dead and decaying plants and animals. They are called decomposers.

(2) Example: Fungi and bacteria.

Scavengers

(1) They consume dead bodies of animals. They are called Scavengers.

(2) Example: Crows, Jackals, Kites.

2. State the difference between biodegradable and non-biodegradable materials. Give one example of each.

Answer:

Biodegradable materials – These are materials which can be broken down into simpler substances by micro-organisms. Example: paper and cloth 

Non-biodegradable – These are materials which cannot be broken down into simpler substances by any micro-organism. Example: Plastic

3. How does decomposition of dead animals turn out to be useful?

Answer: The dead animals decomposed into minerals. These minerals get mix up with the soil and then again used by plants for their growth.

4. Why is Rain water harvesting a ‘ray of hope for overcoming the present ‘scarcity of water’ in cities?

Answer:

Rain water harvesting is a way through which we can save a lot of rainwater which are wasted during the rains. It fulfils the need of water for household uses. During summer times there are some cities where the water table level is very less or in a drought where we need water. Thus, rainwater harvesting is a must in cities to save water. This why rainwater harvesting is array of hope for overcoming the present scarcity of water in the cities.

5. Why do buffaloes cool themselves in water during summer?

Answer: Buffaloes have black coloured skin which is good observant of sunlight and they have no sweat glands. So, they feel hot. To get themselves cooler, they get into water.

6. Draw a diagram that shows the relationship between the biotic and the abiotic components of the environment.

Answer: See page number 10 of your science book for diagram.

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