Science Year 4 DLP

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

Hypothesis that has been made can be tested by conducting an _______________.

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

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

The rate of ___________ is the number of upward and downward chest movements in one minute.

________ in a clean environment ensures that humans breathe better.