Please select a subject first
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Inhaled air contains a large amount of carbon-di-oxide.
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Whales come up to the water surface to breathe in oxygen.
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The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.
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Match the following
| 1. | Moving Air | Photosynthesis |
| 2. | Layer in which we live | Troposphere |
| 3. | Stratosphere | Wind |
| 4. | Oxygen | Ozone layer |
| 5. | carbon-di-oxide | Combustion |
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Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
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Analogy
Photosynthesis : _____ :: Respiration : Oxygen
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How do the roots of land plants get oxygen for breathing?
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Why do traffic assistants wear a mask on duty?
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How do plants and animals maintain the balance of oxygen and carbon dioxide in the air?
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Can you guess why fire extinguishers throw a stream of carbon-di-oxide while putting - off the fire?
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Most organelles in an eukaryotic cell is found in the
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Prokaryotes were the first form of life on earth.
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Match the following
| 1. | Control center | Energy producer |
| 2. | Food producer (Plant cell) | Mitochondria |
| 3. | Gate of the nucleus | Nucleus |
| 4. | Gate of the cell | Chloroplasts |
| 5. | Energy producer | Nuclear membrane |
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Analogy
Prokaryote : Bacteria :: Eukaryote :_______
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Give any three examples of eukaryotic cell?
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Draw a neat labelled diagram of a prokaryotic cell.
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The Materials which are attracted towards the magnet are called ______.
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Paper is not a ______ material.
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Rubber is a magnetic material.
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