Class 5 Science Chapter 3 Forests Solutions

CHAPTER - 3

FORESTS

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Match the following.

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. Forests serve as home to many types of ___________.

2. Forests absorb large amounts of ___________ gas.

3. Deforestation ___________ rainfall in the surrounding areas.

4. ___________ is the largest bird sanctuary in Asia.

5. For early man, forests were a source of _ and _.

Answer

(1) animals

(2) carbon dioxide

(3) reduces

(4) Bharatpur

(5) food, shelter

Match the following.

( Exercise )

DAV Class 5 Science Chapter 3 Question Answer Forests

Answer: 1. (d) 2. (c) 3. (a) 4. (e) 5. (b).

Tick the correct option.

( Exercise )

1. The leaf, used to make disposable plates, is the-

2. Deforestation results in-

3. Bee wax is used to make-.................. 4. Which of the following is not a forest product?............................................... 5. If forests disappear, the amount of-

Answer

(i) areca nut leaf

(ii) all the above

(iii) medicine

(iv) kerosene

(v) carbon dioxide, in air, will increase

Answer the following questions in brief.

( Exercise )

1. Name any four products that are obtained from forests.

Answer: bamboo, honey, wood, medicines.

2. Why do some men cut trees?

Answer: Some men cut trees because of the following reasons:

They need wood for construction.
They need more land to make houses, industries and for agriculture.

3. What is the Gir National Park famous for?

Answer: Gir National Park is famous for Asiatic lion.

4. Name two migratory birds that visit Bharatpur Bird Sanctuary.

Answer: Siberian crane and Barons

…………………………………………………….

5. What is the average temperature and annual rainfall needed for a forest to develop?

Answer: Average temperature is needed greater than 10 degrees Celsius and annual rainfall of at least 200 mm.

Answer the following questions.

( Exercise )

1. List four harmful effects of deforestation.

Answer: Four harmful effects of deforestation are:

Decrease in rainfall in the surrounding areas.
Increase in the amount of carbon dioxide in the atmosphere that can increase global warming.
Decrease in the levels of ground water in the nearby areas.
Destruction of habitat of a number of plants and animals.

2. How do forests prevent soil erosion?

Answer: Forests prevent soil erosion. Trees bind soil particles with their strong roots. This prevents soil from being washed or blown away.

3. State the importance of forests to human beings.

Answer: The importance of forests to human beings are:

The trees purify the air by absorbing carbon dioxide and releasing oxygen.
Trees also help in checking global warming by absorbing carbon dioxide which is the main greenhouse gas.
Forests prevent floods as the soil, held by roots of trees, absorbs running water and prevents floods.
Forests help to bring good rainfall. This leads to more greenery around and better crops.

4. Why are forests known as the lungs of earth’?

Answer: Forests are known as the lungs of earth because forests are earth’s air purifiers. They are often referred to as the earth’s lungs. Just as our lungs absorb carbon dioxide from the blood and infuse it with oxygen, green plants absorb carbon dioxide during photosynthesis and in return, releaseoxygen into the atmosphere.

5. How can we contribute towards protection of forests?

Answer: we can contribute towards protection of forest by following ways:

Minimise the use of wood and wood products.
Do not use products that promote destruction of forests.
We should plant more and more trees by celebrating Van Mahotsav.

CHAPTER - 3

FORESTS

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Match the following.

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. Forests serve as home to many types of ___________.

2. Forests absorb large amounts of ___________ gas.

3. Deforestation ___________ rainfall in the surrounding areas.

4. ___________ is the largest bird sanctuary in Asia.

5. For early man, forests were a source of ___________ and ___________.

Answer

Match the following.

( Exercise )

Tick the correct option.

( Exercise )

1. The leaf, used to make disposable plates, is the-

2. Deforestation results in-

3. Bee wax is used to make-.................. 4. Which of the following is not a forest product?............................................... 5. If forests disappear, the amount of-

Answer

Answer the following questions in brief.

( Exercise )

1. Name any four products that are obtained from forests.

2. Why do some men cut trees?

3. What is the Gir National Park famous for?

4. Name two migratory birds that visit Bharatpur Bird Sanctuary.

Answer the following questions.

( Exercise )

1. List four harmful effects of deforestation.

2. How do forests prevent soil erosion?

3. State the importance of forests to human beings.

4. Why are forests known as the lungs of earth’?

5. How can we contribute towards protection of forests?

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5. For early man, forests were a source of _ and _.