Please select a subject first
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Soda bottle bursts sometimes when it is opened during summer. Why?
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How do astronauts breathe when they go beyond the earth’s atmosphere?
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Which of the following is a water pollutant?
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Excessive use of chemical fertilizers depletes the soil and causes water pollution.
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Explain the different ways by which water gets polluted.
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Why microorganisms are essential for agriculture?
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How can we improve the beneficial bacterial count in human beings?
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Write a short note on probiotics.
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________ is a plant growing in a place where it is not wanted.
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The chemicals used for killing the weeds or inhibiting their growth are called as ______.
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What do you mean by weeding?
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What is weed? Explain the different methods of weed control.
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The animal found in a particular area is known as _______.
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Analogy
Viscous force: ______:: Buoyant force: ______.
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Vacuum flask is also called as ______.
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The vacuum flask was invented by Scottish scientist ______.
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In a thermos flask, the vacuum between the two walls prevents heat from the inside to the outside by radiation.
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What is the function of the silvered wall in a thermos flask?
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In a series circuit, the current remains ______ throughout the circuit.
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What is the name of the sound produced by irregular vibrations?
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