Test: Forests Our Lifeline

Kerosene is derived from petroleum and is a combustible hydro-carbon in liquid state. It is not derived from forests and so is not a forest product.

Forest products are materials that are derived from forests and forestry either for direct consumption or for commercial use. Gum, plywood and sealing wax are all obtained from forests for different purposes and so are categorized as forest products.

Microorganisms act upon the dead plants to produce humus the increase the fertility of soil.

Trees and vegetation act as wind breakers to prevent soil erosion as the root of plants binds the soil.

Quinine is an alkaloid, a naturally occurring chemical compound. Quinine was first isolated in 1820 from the bark of a cinchona tree. Bark extracts have been used to treat malaria since at least 1632.

Forest helps in water cycle, balancing oxygen and carbon dioxide and provides habitat for wild life but formation of soil is not done by forest.

The process of eating and being eaten is called as food chain to transfer energy from one organism to other organism.

Wooden door, windows and chair are made of timber obtained from forest while polythene is manmade product.

Medicine, furniture and paper are obtained from plants but petrol is obtained from petroleum.

Plants convert CO₂ into O₂ during photosynthesis. Exchange of gases takes place through stomata.

Mountain appears green due to presence of plants on it in form of herb, shrub and tree.