Last updated on August 30th, 2023 at 01:10 am
Forests our Lifeline Class 7 Extra Questions and Answers
Define the following terms:
Forest – Forests are large areas covered with trees, shrubs, herbs, grasses, creepers, and climbers.
Decomposers – Decomposers are organisms that decompose dead plants and animals and return nutrients to the soil.
Food chain – Food chains tell us who eats what and where in the environment. Food is a form of energy that is passed from one organism to another.
Food Web – A food web is a complex feeding system made up of several food chains. The balance between living and non-living things is maintained by nature.
Canopy – The roof formed by the crown of trees present in a thick forest is called a canopy.
Afforestation – Afforestation is the process of planting more trees to renew a forest. However, the process is slow because new saplings take several years to grow.
Answer the following questions:-
[Q] How are forests useful to us?
A forest protects us from floods, maintains the water table, prevents soil erosion, provides oxygen, cools the air, increases rainfall, provides food and shelter for wildlife, and provides various products for us.
[Q] Why do plants depend on animals?
Plants depend on animals for pollination, dispersal of seeds, and nutrients.
[Q] How can we conserve Forests?
Forests can be conserved through the planned harvesting of trees, afforestation, fire, insect, and pest protection, and overgrazing control.
[Q] List ways in which forests are useful to us.
Forests are useful to us in the following ways:
Forests prevent soil erosion and flooding, The release of water vapors in the air maintains the climate and cools an area. All the basic needs of mankind are met by them, including food, clothing, and shelter. Using carbon dioxide during photosynthesis reduces global warming by maintaining the balance between carbon dioxide and oxygen in the atmosphere.
[Q] What do you think will be the consequences if all forests on the earth disappear?
If all the forests on earth disappear, it will lead to the following consequences:
Earth’s temperature will rise, and animals will have no food or shelter. It will be impossible for soil to hold water, causing floods. No air will be purified, and nutrients will not be recycled.
[Q] Give two examples of scavengers. Why are they useful to the environment?
Plants and animals that eat dead bodies are scavengers. Crows and vultures are scavengers. In order to keep the environment clean, they eat the dead bodies of plants and animals.
Q: What are the main layers of vegetation in a forest?
A: In a forest, the main layers of vegetation are trees (uppermost layer), followed by shrubs, and herbs (the lowest layer).
Q: How do forests influence climate, water cycle, and air quality?
A: Forests help regulate climate by absorbing carbon dioxide and releasing oxygen, maintaining the water cycle through transpiration and evaporation, and purifying air by filtering out pollutants and particulate matter.
Q: What are some important functions of forests?
