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प्रश्न
When water is heated, we see bubbles rising up. Why?
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उत्तर
Water has a lot of air dissolved on it. This is what allows breathing to fishes and other aquatic beings. The solubility of gases decreases when the temperature is raised, and that is why the dissolved air bubbles out from the water.
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संबंधित प्रश्न
We often leave the lights switched on and fans running when we are not in the room. We switch on the air-conditioning even though we don’t really need it. We insist on being dropped to school in the car every day. Thus, we waste valuable energy which is generally produced by burning coal and petroleum. As you know, the burning of these fuels release gases that pollute the atmosphere.
Make a list of the similar things that we do without realizing that we are destroying the environment. Think of the ways that we can behave differently.
State whether the following is true or false.
The earth’s atmosphere contains 99 per cent oxygen, which is essential for life.
What is responsible for causing a hole in the ozone layer?
Give reason:
Thermosphere is also referred to as “Heterosphere”.
Why is the troposphere the most important of all the layers of the atmosphere?
______ is the lowest layer of the atmosphere.
Why mountain climbers carry oxygen while climbing?
Exosphere has a high temperature.
Why do aircraft usually fly above the troposphere layer?
Choose the correct sequences
