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Mind Map: Air Around Us | Science for Class 2

The document Mind Map: Air Around Us | Science for Class 2 is a part of the Class 2 Course Science for Class 2.
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FAQs on Mind Map: Air Around Us - Science for Class 2

1. What is the composition of air around us?
Ans. The air around us is mainly composed of nitrogen (about 78%), oxygen (about 21%), and small amounts of other gases such as carbon dioxide, argon, and water vapor. This mixture is essential for life on Earth, as oxygen is needed for breathing, and plants use carbon dioxide for photosynthesis.
2. Why is air important for living things?
Ans. Air is crucial for living organisms because it provides the oxygen necessary for respiration, which is the process by which animals and humans obtain energy. Additionally, plants need carbon dioxide from the air for photosynthesis, allowing them to produce food and release oxygen as a byproduct.
3. How does air pressure affect us?
Ans. Air pressure is the weight of the air above us pressing down. It affects weather patterns and can influence our daily lives. For example, high air pressure typically means clear skies and good weather, while low air pressure can lead to clouds and precipitation. Air pressure also plays a role in how we breathe; as altitude increases, air pressure decreases, making it harder to get enough oxygen.
4. What are some common uses of air in our daily life?
Ans. Air has many practical uses in our daily lives. It is used in various industries for processes like combustion in engines, inflating tires, and operating pneumatic tools. Additionally, air is essential for the functioning of many appliances, such as refrigerators and air conditioners, which rely on the movement of air to cool and circulate.
5. How can we keep the air around us clean?
Ans. Keeping the air clean is important for our health and the environment. We can reduce air pollution by using public transportation, carpooling, or biking instead of driving alone. Additionally, conserving energy, recycling, and using environmentally friendly products can help reduce harmful emissions. Planting trees and maintaining green spaces also contribute to cleaner air by absorbing carbon dioxide and releasing oxygen.
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