The jumbled names form water, wind, forest and rock. Water, wind and forests can be renewed when used carefully. Rocks and minerals form over very long periods, so they are treated as non-renewable resources.
Water tap - atwre - water - renewable; windmill - ndiw - wind - renewable; forest - refost - forest - renewable; rock - ocrk - rock - non-renewable.
Natural resources come from nature. Machines are made by humans. Natural gas is a fossil fuel and non-renewable. Air is naturally replenished and is treated as renewable when not polluted.
(i) True. (ii) False. Machines are human-made things made using natural resources. (iii) True. (iv) True.
Most scooters and bikes commonly use petrol. Water is a renewable resource, while coal, natural gas and petrol are fossil fuels and non-renewable.
(i) Petrol (ii) Water
Forests can regrow if protected and managed carefully. Coal, natural gas and minerals form over very long periods and cannot be replaced quickly.
Renewable resource: forests. Non-renewable resources: coal, natural gas and minerals.
A non-renewable resource is present in limited quantity and cannot be replenished in a short time.
Petroleum is called non-renewable because it takes millions of years to form from the remains of living organisms, while humans use it much faster than it can be naturally replaced.
Planting saplings is useful, but rebuilding a complete forest ecosystem requires time, protection and suitable environmental conditions.
A forest is not just a group of trees. It includes many kinds of plants, animals, microorganisms, soil, water and interactions among them. Mature trees take many years to grow, and the original biodiversity and soil quality may take a very long time to return after a forest is cut. Therefore regrowing a forest is difficult.
The answer connects daily activities with natural resources and gives practical conservation steps.
Examples: drinking and bathing use water; cooking uses fuel; travelling uses petrol or diesel; writing uses paper from trees; using electricity may use coal, water, wind or sunlight. We can reduce use by closing taps, taking shorter baths, saving electricity, walking or cycling for short distances, using public transport, reusing paper and avoiding waste.
Air supports life, supports burning and can exert force when it moves.
Breathing, burning of fuels, flying kites or balloons, winnowing grains, and drying clothes are activities possible due to the presence or movement of air.
Green cover improves air, soil, shade and habitat. Planting and protecting trees both matter.
Actions include planting native trees, caring for saplings, watering plants regularly, protecting plants from damage, avoiding unnecessary cutting of trees, making compost for plants, encouraging neighbours to plant trees and participating in school or community plantation drives.
The illustration shows a solar cooker, which uses heat from sunlight.
(i) Solar energy is being used for cooking. (ii) Benefit: It is renewable and does not produce smoke while cooking. Drawback: It depends on sunlight and cannot be used well at night or on cloudy/rainy days.
Forests protect soil physically and improve it through leaf litter and living organisms.
Tree roots hold soil together and reduce erosion. Fallen leaves add organic matter and help form humus. Tree cover also reduces the force of rain and wind on soil. When trees are cut on a large scale, soil can be washed or blown away and its fertility decreases.
Reducing fuel burning lowers smoke and harmful gases released into the air.
Air is polluted when vehicles burn petrol or diesel and release smoke and harmful gases. It is also polluted when industries or people burn coal, waste or crop residue. One action to reduce air pollution is to use public transport, cycling or walking for short distances instead of using private vehicles.
Solar panels depend directly on sunlight. Gas stoves use fuel, and windmills depend mainly on wind.
If there were no sunlight for a week, the solar panels would not generate electricity, or would generate very little. The family could still cook using the gas stove because it uses gas, not sunlight. The windmill could still pump water if wind is available. Plants and daily life would also be affected if lack of sunlight continued.
Coal, petroleum and natural gas are fossil fuels and are non-renewable. Forest, air and water are renewable resources when protected and used responsibly.
Natural Resources are classified into non-renewable resource and Renewable Resources. Under non-renewable resource: fossil fuels, which include coal, natural gas and petroleum. Under Renewable Resources: forest, air and water.
The report should balance human needs with conservation of forests as renewable but difficult-to-regrow resources.
Large-scale felling of trees is not justified if it destroys forests, reduces biodiversity, causes soil erosion and worsens air quality. Human needs for housing and industry are important, but they should be met through planned development, careful use of wood, recycling, use of alternatives, permission-based cutting and compensatory plantation. A brief report should recommend reducing unnecessary cutting and protecting existing forests.
Water conservation works best when leaks, habits and reuse are all addressed together.
Plan: check and repair leaking taps, use push taps where possible, place posters near wash areas, collect leftover drinking water for plants, water gardens in the morning or evening, use buckets instead of running hoses, and form a student water-monitor group. This will reduce wastage, save freshwater and lower the burden on local water sources.