Question

Describe an activity to show that exhaled air contains carbon dioxide
Describe the changes that take place (i) around the rib cage (ii) diaphra
(iii) chest cavity, during inspiration. State the effect of these changes.
6.
7
rithe ribcage expands​

Answer 1

Answer:

Take a test tube fill it with freshly prepared lime water take a straw dip it inside lime water and then exhale you will find that the lime water turns its colour to white like milky colour. This shows that the air which we exhale is carbon dioxide .

Explanation:

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Answer 2

Answer:

since -2//3 and -1/5 both are negative rational numbers so we can choose any positive rational number. And the positive rational number will not be present in the interval (-2/3 , -1/5). So we choose "4/1" which is position rational number. You can choose any positive number like 5/2, 8/4 and 9/7 etc.