Worksheets With Solutions: Forest: Our Lifeline Class 7 Worksheet Science Chapter 12

Section A: Multiple Choice Questions

Correct Answer is Option (d)
Arctic Forests are not found in India as they are found in extremely cold regions like the Arctic.

Q.2. Which of the following is not a use of forests?
(a) Providing timber for furniture
(b) Providing medicines
(c) Providing space for construction of buildings
(d) Providing oxygen for breathing

Correct Answer is Option (c)
Providing space for construction of buildings is not a use of forests. It is a human activity that often leads to deforestation.

Q.3. Which of the following is not an example of interdependence between plants and animals in a forest ecosystem?
(a) Bees pollinating flowers
(b) Monkeys eating fruits
(c) Deer grazing on grass
(d) Fish swimming in a river

Correct Answer is Option (d)
Fish swimming in a river is not an example of interdependence between plants and animals in a forest ecosystem. It is an example of aquatic ecosystem interdependence.

Q.4. What is the role of trees in forests?
(a) To provide shade
(b) To provide oxygen
(c) To provide food for animals
(d) All of the above

Correct Answer is Option (d)
Trees in forests provide shade, oxygen, food for animals, and many other benefits.

Q.5. If forests disappear, which of the following would not be a consequence?
(a) Loss of habitat for animals
(b) Decrease in oxygen levels
(c) Increase in carbon dioxide levels
(d) Increase in water availability

Correct Answer is Option (d)
Increase in water availability is not a consequence of deforestation. In fact, deforestation can lead to water scarcity in some areas.

Section B: Short Questions

Two types of forests found in India are Tropical Forests and Deciduous Forests.

Q.2. Give two examples of the use of forests.

Two examples of the use of forests are providing timber for furniture and providing medicines.

Q.3. Explain the interdependence between plants and animals in a forest ecosystem.

In a forest ecosystem, plants and animals depend on each other for survival. Plants provide food and habitat for animals, while animals help in pollination and seed dispersal for plants.

Q.4. What are the three main roles of trees in forests?

The three main roles of trees in forests are providing oxygen, regulating climate, and providing habitat for animals.

Q.5. Explain one consequence of deforestation.

One consequence of deforestation is soil erosion, which can lead to landslides and flooding.

Section C: Fill in the Blanks

Lifeline: Forests are referred to as the lifeline of life on earth because they play a crucial role in providing oxygen, maintaining the water cycle, and supporting biodiversity.

Q.2. ______________ is the process of cutting down trees for commercial purposes.

Deforestation: Deforestation is the process of cutting down trees for commercial purposes. It has adverse effects on the environment, including soil erosion, loss of habitat, and climate change.

Q.3. Trees are important because they release ______________ into the air.

Oxygen: Trees release oxygen into the air as a by-product of the process of photosynthesis. Oxygen is essential for the survival of all living beings. 

Q.4. The ______________ of trees in a forest helps in maintaining the ecological balance.

Profile: The profile of trees in a forest is important for maintaining the ecological balance. Different species of trees support different types of animals and plants, which helps maintain the ecosystem's biodiversity.

Q.5. Forests are home to a variety of ______________ and animals.

Plants and Animals: Forests are home to a variety of plants and animals, which are interdependent on each other for their survival.

Section D: Match the Column

Section E: True or False

False: Forests are essential for the survival of living beings on earth. They provide oxygen, maintain the water cycle, and support biodiversity.

Q.2. Trees help in maintaining the ecological balance of the earth.

True: Trees play a crucial role in maintaining the ecological balance of the earth. They release oxygen, absorb carbon dioxide, and provide habitat for animals.

Q.3. Deforestation refers to the process of planting more trees.

False: Deforestation refers to the process of cutting down trees for commercial purposes, which has adverse effects on the environment.

Q.4. Forest fires do not have any impact on the environment.

False: Forest fires have a significant impact on the environment, including soil erosion, loss of habitat, and climate change.

Q.5. Wildlife does not depend on forests for their survival.

False: Wildlife depends on forests for their survival. Forests provide food, shelter, and habitat for a variety of animals.