NCERT Solutions for Class 6 Science Chapter 15 Air Around Us
Answer :
Take some water in a glass vessel or beaker. Heat it slowly on a tripod stand. Before the water begins to boil, look carefully at the inner surface of the vessel. You will see tiny bubbles on the inside. On heating, air dissolved in water escapes in the form of these bubbles.
NCERT Solutions for Class 6 Science Chapter 15 Air Around Us
Answer :
In photosynthesis, plants take carbon dioxide and give out oxygen. The animals breath in oxygen in respiration and carbon dioxide is given out which is again used by plants for photosynthesis, that is, preparation of food by plants. This is how plants and animals help each other in the exchange of gases in the atmosphere.