Matter has mass and takes up space

Leaf soaked in hot water

In Systems Workbook Activity 2.4 (page 15), we recalled that there are tiny openings found on the surfaces of the leaves.

Let's soak a leaf in a container of hot water and observe.

Observations:

• There were many tiny bubbles on the leaf. 
• There were more bubbles on the lower surface than on the upper surface.

GetActive! Singapore workout 2016

How your lungs work

This is the cartoon that I showed in class during science lesson on our respiratory system.