Air Around Us: Class 6 Science Q&A · Page 2
25 free answers on Air Around Us (Science) for Class 6 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- ScienceClass 6CBSE
The layer of air around the earth is known as ___________.
Solution: The layer of air around the earth is known as the atmosphere.
- ScienceClass 6CBSE
Why does a lump of cotton wool shrink in water?
Solution: The lump of cotton wool shrink in water because the air inside the cotton lumps is replaced by water which makes the layer stick together.
- ScienceClass 6CBSE
How will you show that air is dissolved in water?
Solution: Take some water in a container. Heat it slowly on a tripod stand. Before the water begins to boil, look at the inner surface of the container. We observe tiny bubbles inside. These bubbles come from the air dissolved in water. When you heat the water, to begin with, the air dissolved in it escapes. This experiment concludes that air is present in the water.
- ScienceClass 6CBSE
How will you prove that air supports burning?
Solution: Place two candles of the same length on a table. Light both candles. Cover one of the candles with an inverted glass tumbler. We can observe that the candle covered with the glass tumbler got extinguished after some time, whereas the other candle continued burning. The candle gets extinguished because the air component inside of the glass tumbler, which supports burning, is limited. Most of the component is used up by the burning candle. However, the
- ScienceClass 6CBSE
Which gas in the atmosphere is essential for respiration?
Solution: Oxygen in the atmosphere is essential for respiration.