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प्रश्न
Define the following:
Respiration
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उत्तर
Respiration: Respiration is a chemical process that takes place in all living beings (slow in plants). In this process, oxygen present in inhaled air reacts with the digested food material in the body. This results in the release of energy, carbon dioxide, and water.
Sugar + Oxygen → CO2 + Water + Energy.
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संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Give two uses of the following component present in air:
nitrogen
Name two air pollutants which cause global warming.
Describe a simple experiment with the help of a diagram to show that Air occupies space
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
Name the following.
Inert gases in the air
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Why did the tiny bubbles appeared?
