In Biology we are studying the Respiratory System.

Here is a post of Male’s blog that explains very well the topic with some tests and activities! (STUDY FROM HERE)

This is a table showing the Gaseous Exchange:

 

 

 

 

 

Comparing the amount of carbon dioxide in inspired and expired air we lead to a:

HYPOTHESIS: The expired air contains more carbon dioxide than the inspired air.

LIMEWATER:     clear ——-CO2——-> cloudy