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प्रश्न
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
The ______ makes the windmill rotate.
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उत्तर
The wind makes the windmill rotate.
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संबंधित प्रश्न
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Define rusting?
Name two air pollutants which affect our health.
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Name the following.
Gases that are harmful to the ozone layer
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Wind does not help in the movement of which of the following?
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
