Class 7 Science Chapter 12 Question Answers - Forests - Our Lifeline

Very Short Q & A :

Q1: Name the resource that serves as green lungs and water purifying systems in nature.

Ans : Forest

Q2: Elephants and Jackals live in the deeper area of the forest.True/False

Ans : True

Q3: Forest provides a ______________ for many animals and plants.

Ans : Home

Q4: The variety of plants found in forests includes

1. Shrubs
2. Climbers
3. Creepers
4. All of the above

Ans : All of the above

Q5: What is crown of the tree?

Ans : The branchy part of the tree above the stem is known as crown of the tree.

Q6: There is similar kind of trees in every forest.True/False

Ans : False

Q7: The types of animal also differ from forest to ____________.

Ans : Forest

Q8: Name some insects found in forest.

Ans : Spiders, squirrels, ants etc.

Q9: Grass is eaten by____________ which in turn is taken by __________.

Ans : Insects which in turn is taken by frog.

Q10: Complete the following food chain: Grass --->Insects __________ --->snake ---> ________.

Ans : Grass --->Insects ---> Frog ---> Snake ---> Eagle.

Q11: Name the process by which plants release oxygen.

Ans : Photosynthesis

Q12: Plants also maintain balance of oxygen and carbon dioxide in the atmosphere.True/False

Ans : True.

Q13: The decaying animal _______________ provides nutrients to the seedling in the forest to grow.

Ans : Dungs

Q14: Name the living organism that helps in maintaining the supply of nutrients to the growing plants in the forest.

Ans : Decomposers

Q15: Forest is dynamic living__________.

Ans : Entity

Q16: Forest is full of life and ________________.

Ans : Vitality

Q17: The area surrounded by forest does not receive good rainfall.True/False

Ans : False

Q18: The advantage of living in an area nearby or surrounded by forest is:

1. Less rainfall
2. Less noise pollution
3. Unpleasant weather
4. None of these

Ans : Less noise pollution

Q19: Name some factors responsible for clearing of forests.

Ans :  Construction of roads and buildings, industrial development, increasing demand of wood etc.

Q20: Forest is on the verge of disappearing because of

1. Overgrazing of animals
2. Indiscriminate felling of trees
3. Urbanisation
4. All of the above

Ans : All of the above

Q21: Forest is source of medicinal plants. True/False

Ans : True

Q22: The insects, butterflies, honeybees and birds help flowering plants in_________.

Ans : Pollination.

Q23: A forest is a purifier of __________ and ____________ water.

Ans : Air and ground.

Q24: Name the plant that forms the lowest layer in forest.

Ans : Herbs form the lowest layer in the forest.

Q25: The decaying leaves and animal droppings in a forest enrich the soil nutrition in the form of humus. True/False

Ans :  True

Q26: Which of the following is not a forest product?

1. Plywood
2. Sealing wax
3. Gum
4. Kerosene

Ans : Kerosene

Q27: Micro-organisms act upon the dead plants to produce

1. Humus
2. Sand
3. Wood
4. Mushroom

Ans : Humus

Q28: What is canopy?

Ans : Tall trees which look like roof over other plants in the forest is called canopy.

Q29: Forests are the ___________for the forest dwelling communities.

Ans : Home

Q30: The different horizontal layers in the forest are known as understoreys.True/False

Ans : True

Q31: Forest helps in causing floods.True/False

Ans : False

Q32: Name any two forest products.

Ans : Wax and paper

Q33: _______________will endanger our life and environment.

Ans : Deforestation

Q34: What is Endemic species?

Ans : When an animal or a plant is found in a specific area, it is known as an endemic species.

Q35: The soil of the forest is moist and warm because it is covered with leaves and fruits. True/False

Ans : True

Q36: Forest also acts as natural__________________ of rain water.

Ans:  Absorber