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 Air 40 Flashcards |
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What is the most abundant gas in the Earth's atmosphere? |
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Nitrogen |
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Which gas is essential for both breathing and burning? |
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Oxygen |
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Riddle: I am invisible and weighty, filling balloons and making them float. What am I? |
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Air |
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True or False: Air is composed only of oxygen and nitrogen. |
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False. Air is a mixture of gases including nitrogen, oxygen, carbon dioxide, argon, and others. |
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The process of taking in and releasing air is called ______. |
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Breathing |
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Fill in the blank: Air supports burning because of the ______ it contains. |
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Oxygen |
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Which of the following is a natural cause of air pollution? A) Vehicle emissions B) Volcanic eruptions C) Burning garbage D) Industrial waste |
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B) Volcanic eruptions |
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What is the role of carbon dioxide in photosynthesis? |
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Plants use carbon dioxide to produce glucose and oxygen. |
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Riddle: I can be clean or polluted, and I am essential for life. What am I? |
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Air |
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True or False: Plants breathe through their roots. |
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False. Plants breathe through stomata on the lower surface of their leaves. |
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What happens to air when it is heated? |
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Air expands as its particles move faster and spread out. |
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Fill in the blank: Pollutants such as smoke and dust make the air ______. |
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Dirty |
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Which of the following gases is present in small amounts in the air? A) Hydrogen B) Argon C) Helium D) Nitrogen |
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B) Argon |
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What is one effect of air pollution on human health? |
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It can cause health issues like asthma and chest pain. |
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Riddle: I am a gas that helps plants grow, but too much of me can be harmful. What am I? |
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Carbon dioxide (CO₂) |
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True or False: Aquatic animals breathe through lungs. |
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False. Aquatic animals mostly breathe through gills. |
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Fill in the blank: To keep air clean, we can plant more ______. |
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Trees |
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What can be done to reduce harmful gas emissions from vehicles? |
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Using CNG and LPG as vehicle fuels. |
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Which activity contributes to air pollution? A) Walking B) Recycling C) Burning fuel D) Planting trees |
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C) Burning fuel |
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What is one way to improve air quality in urban areas? |
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Using public transport or walking for short distances. |
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Completed! Keep practicing to master all of them. |
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