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MCQs for General Science Video Lecture | General Knowledge - SSC CHSL

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FAQs on MCQs for General Science Video Lecture - General Knowledge - SSC CHSL

1. What is the scientific method?
Ans. The scientific method is a systematic approach used by scientists to investigate and understand the natural world. It involves making observations, formulating hypotheses, conducting experiments, analyzing data, and drawing conclusions based on evidence.
2. What are the main branches of science?
Ans. The main branches of science include physics, chemistry, biology, earth science, and astronomy. Each branch focuses on a specific aspect of the natural world and employs different methodologies to study and understand it.
3. How does a vaccine work?
Ans. Vaccines work by stimulating the immune system to recognize and defend against specific pathogens. They usually contain weakened or inactivated forms of the pathogen or its components, which provoke an immune response. This response leads to the production of antibodies and memory cells that provide long-term protection against future infections.
4. What is the difference between renewable and non-renewable resources?
Ans. Renewable resources are those that can be replenished or replaced naturally in a relatively short period of time, such as solar energy, wind energy, and biomass. Non-renewable resources, on the other hand, are finite and cannot be easily replenished, such as fossil fuels (coal, oil, and natural gas) and minerals. The use of non-renewable resources contributes to environmental degradation and climate change.
5. How does the greenhouse effect contribute to global warming?
Ans. The greenhouse effect is a natural process in which certain gases in the Earth's atmosphere trap heat from the sun, preventing it from escaping back into space. However, human activities, such as the burning of fossil fuels, have increased the concentration of greenhouse gases in the atmosphere, leading to an enhanced greenhouse effect. This results in the Earth's surface and lower atmosphere warming, causing global warming and climate change.

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