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प्रश्न
Fill in the blank
Green plants need ________________to prepare food.
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उत्तर
Green plants need CO2 water and light to prepare food.
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संबंधित प्रश्न
Describe a simple experiment to show that l/5th of air is oxygen.
Briefly state the importance of Nitrogen.
Fill in the blank
The reddish-brown powder on the surface of iron nails exposed to air and moisture is called _____.
Write the percentage of the gases present in air.
Air is made up of oxygen only.
Whales come up to the water surface to breathe in oxygen.
Nitrogen is _______ than air.
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
Write the reaction of carbon dioxide with lime water.
Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.
- Bubbles of air came out from the bottle.
- Some water entered the bottle.
- Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
- No bubbles formed, only water entered the bottle.
Which observations is/are correct?
