Science Year 4 DLP

A variable that is observed in an investigation is known as a (a)   .

Hypothesis that has been made can be tested by conducting an (a)   .

The size of the _______ lung is smaller compared to the _____because the heart is located on the _______ side.

(a)  

Exchange of gases take place in the lungs.__________ enters the lungs while ___________ leaves the lungs.

(a)  

The rate of (a)   is the number of upward and downward chest movements in one minute.

(a)   in a clean environment ensures that humans breathe better.