Salt water and Fresh water

The year 5 and 6 students have been learning about the difference between salt and fresh water. Mason from G3 has written about what they did.

On Thursday 22 of July G3 went to Miss Harrison's super high tech lab to experiment about salt and fresh water.

For our first experiment we tested what happens when we put salt water into fresh water. The result was that the density of the salt water is greater than fresh water so the salt water dropped to the bottom and the fresh water floated on the top.

The second experiment was a colour code with different densities for different coloured water. We first test the different colours to see if they mixed or stacked on top of each other. Then we had to look at our results and were able to stack every colour without mixing them.

And that was what we learned at Miss Harrison's lab on Thursday. It was a lot of fun but very challenging.

This photo shows what happened when we put the green salt water into clear fresh water. The green salt water went to the bottom.

This photo clearly shows what happened when we added blue fresh water to clear salt water. The blue fresh water floated on the top of the salt water because it is less dense.