Density Sub Marine Activity

Slide 1

Our previous lesson

Density is the mass per unit volumeWe have carried out some activity about densityWe compared the density of substances

2) We draw the layer of density

Now lets test our brain !How to make an egg floats without make any changes on it?

sinking

floatingThe easiest way to floating an egg isAdd some salt in the water =)

FRESH WATERSALT WATER

Explaination????Fresh water is LESS DENSE than eggso the egg sinksSalt water is MORE DENSE than eggso the egg floats

THE APPLICATIONS OF DENSITY IN EVERYDAY LIFEREFER TO PAGE 8 OF YOUR SELF-NOTEBamboo are less dense than water, so a raft is able to stay afloat on water

Water is denser than wood, so logs are transported by the river

Cold air is denser than hot air, so we can fly through the air by riding on a hot-air balloon

When something is filled with air, it become less dense than water, so we use floats to help us stay on the surface of the water

Conclusion of our lesson today : OBJECT WHICH IS LESS DENSE WILL STAY ABOVE

OBJECT WHICH IS MORE DENSE WILL STAY BELOWSub-marine project

Build a model of sub-marine using all stuffs provided. You may refer to page 7 of your self-notes

Homework

Complete page 7 and 8 of self-notes