DAV Class 5 Science Solution Chapter 3 Forests
DAV School Books Class 5 Science Solution Chapter 3 Forests all Question Answer. DAV Class 5 3rd Chapter Forests full Chapter explanation by expert teacher.
A.) Fill in the blanks.
Answer: (1) animals (2) carbon dioxide (3) reduces (4) Bharatpur (5) food, shelter
Match the following:
1. resins | a. Cutting down of trees |
2 forests | b. adhesives |
3 deforestation | c. Soil conservators |
4. ashwagandha | d. paints |
5. gums | e. Medicinal plants |
Answer: 1. (d) 2. (c) 3. (a) 4. (e) 5. (b).
C.) Tick the correct option.
1.) The leaf, used to make disposable plates, is the-
Answer: areca nut leaf
2.) Deforestation results in-
Answer: all the above
3.) Bee wax is used to make-
Answer: medicine
4.) Which of the following is not a forest product?
Answer: kerosene
5.) If forests disappear, the amount of-
Answer: carbon dioxide, in air, will increase
D.) Answer the following questions in brief.
1.) Name any four products that are obtained from forests.
Answer: Forests provide us with important products such as wood, paper from bamboo, gums and resins, honey
2.) Why do some men cut trees?
Men cut trees so that they can obtain the wood from it and use it for different purposes
3.) What is the Gir National Park famous for?
Answer: The Gir National Park is famous for asiatic lion
4.) Name two migratory birds that visit Bharatpur Bird Sanctuary.
Answer: Barons, Pelicans visit the Bharatpur Bird Sanctuary in Rajasthan
5.) What is the average temperature and annual rainfall needed for a forest to develop?
This can only develop at places where the average temperature is more than 10 degrees Celsius and has an annual rainfall of minimum 200 millimeters
E.) Answers the following questions.
1.) List four harmful effects of deforestation.
Reforestation can decrease the amount of rainfall due to an imbalance in the water cycle, the amount of carbon dioxide also increases causing global warming also many animals lose their habitat
2.) How do forests prevent soil erosion?
Since the roots of trees grip the soil tightly they prevent frequent floods by tightening the soil and binding it together.
3.) State the importance of forests to human beings.
Forests provide us with many valuable products such as wood that can be used for timber and other human activities. From forest we also get gums Raisin and dyes that are used for making adhesives and medicines. we also derive leaves. Which are used for medicinal purpose
4.) Why are forests known as the lungs of earth’?
Forests are known as the lung of earth because like the lungs are used by humans to give away the harmful carbon dioxide similarly plants absorb the carbon dioxide for our benefit and hence help us in breathing properly just like the lungs do hence it is known as the lungs of earth
5.) How can we contribute towards protection of forests?
People should practise afforestation and also try to reduce deforestation. people should also make proper use of products that are derived from the forest,other than that plants can be celebrated by festivals and encouraging others to do so as well. The van mahotsav is celebrated in many parts of India.
Please tell us answers of something to do also.