Energy Sources and Human Needs
Energy is required for various activities in our daily lives. A good source of energy should be easily accessible, efficient, and cost-effective. We classify energy sources into conventional and non-conventional categories.
Important Topics for HSLC 2027
- Conventional Sources: Fossil fuels (coal, petroleum), thermal power plants, hydro power plants, and biomass (wood, cow-dung cakes).
- Wind Energy: Advantages and limitations of wind energy farms.
- Non-conventional Sources: Solar energy (solar cells, solar cookers), energy from the sea (tidal, wave, ocean thermal), geothermal energy, and nuclear energy.
- Environmental Consequences: Impact of energy extraction and use on the environment and the need for sustainable energy.
Chapter-wise Question Answer
Prepare these Class 10 Science solutions for your board exams:
Q1: What are the disadvantages of fossil fuels?
Ans: Fossil fuels are non-renewable and their combustion releases harmful gases like CO2 and SO2, which cause air pollution and global warming.
Q2: Name the main component of bio-gas.
Ans: Methane (CH4).
HSLC Science MCQ & PDF
Focus on the advantages of solar energy and the limitations of harnessing energy from the sea for the 2027 HSLC exams.
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