17. Forests: Our Lifeline Science class 7 in English Medium ncert book solutions topic -3

Additional Question with solution:

Que: List some animal which live in deeper areas of the forest.

Ans: Boars, bisons, jackals, porcupines, elephants, etc. live in the deeper areas of the forest.

Que: Give the reason behind variations found in the forests of different regions.

Ans: The variation in the type of plants and animals is found in different forests because of the climatic conditions of that particular area.

Que: Are there similar kind of trees in every forests?

Ans: No, due to different climatic conditions, there are variations in the type of trees and other plants. From forest to forest.

Que: State the consequence when one food chain is disturbed in an ecosvstem.

Ans: Since, all food chains are interlinked disturbance in one food chain will affect the other food chain in a forest.

Que: What is a canopy?

Ans: The uppermost branches and leaves of tall trees act like a roof over forest ground, this is called a canopy.

Que: While going inside a forest, it becomes darker. why?

Ans: In a forest, big trees, shrubs and plants are found. They trap solar radiation for photosynthesis.

Que: give names of any four birds which you expect to see in a forest.

Ans: The four birds which we expect to see in a forest are jungle crow, hornbill, myna and koel.

Que: Draw any simple food chain in a pond.

Ans: A typical food chain in a pond is 

 Algae -------> small fishes ---------> Large fishes

Que: Name any four useful products other than wood, which we get from forests.

Ans: Four useful products other than wood which we get from forests are gum, spices, fodder for animals and medicinal plants.

Que: Deforestation may lead to floods. Why?

Ans: Deforestation leads to floods as lesser number of trees will be available due to deforestation. In the absence of trees, the soil will hold water leading to floods.

Que: All the needs of animals living in a forest are fulfilled. Justify this statements in a few sentences.

Ans: Forest provides homae (shelter), food and water to the animals living there. Thus, all the needs of animals living in a forest are fulfilled.

Que: Forests are valuable resources. Explain.

Ans: Forest products play vital role in socio - economic development. We get food, fire wood, fibre, construction material, industrial products and products of medicinal importance. It is also the home of diverse wildlife which maintains the ecosystem. Thus, forests are valuable resources.