NCERT Class VII Science Solutions: Chapter 17-Forests: Our Lifeline Part 2

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Question 8:

Which of the products is not obtained from a forest?

1. Honey

2. Catechu

3. Gum

4. Ginger

Answer: D

Question 9:

The branchy part of a tree above the stem is known as

1. Crown

2. Canopy

3. Sapling

4. Humus

Answer: A

Question 10:

Forests are not responsible for

1. Providing medicinal plants.

2. Maintaining the flow of water into the streams.

3. Creating flood conditions.

4. Absorbing rainwater and maintaining water table.

Answer: C

VERY SHORT ANSWER QUESTIONS

Question 11:

Paheli while moving in a forest observed that there was no noise pollution, though lots of heavy vehicles were passing from the nearby highway. Explain why?

Answer:

Forest absorbs the noise.

Question 12:

State whether the following statements are true or false. If false, give the correct statement.

1. Forests influence climate, water cycle and air quality.

2. In a forest, trees form the uppermost layer, followed by herbs. The shrubs form the lowest layer of vegetation.

3. The forest keeps on growing and changing and can regenerate.

4. Forests protect the soil from erosion.

Answer:

1. Forests influence climate, water cycle and air quality. (True)

2. In a forest, trees form the uppermost layer, followed by herbs. The shrubs form the lowest layer of vegetation. (False)

   Hint: the sequence is trees, shrubs and lowest one herbs.

3. The forest keeps on growing and changing and can regenerate. (True)

4. Forests protect the soil from erosion. (True)

Question 13:

Paheli wrote a food chain in the following way:

The chain is not in the correct order. Help her to write the food chain correctly.

Answer: