Can rocks float?

Not all rocks sink.
Pumice floats on water because it´s formed due to quick cooling of lava on the Earth Surface.
It has many holes in it (gases trapped inside when it was being formed.)
It is full of bubbles and it has less density.

Making models of atoms and molecules

It was raining and we made molecules. The balls are atoms; they are going to be connected to make molecules.

If you don´t have a molecule kit, you can use  white balls and toothpicks.

I.e.to make a hydrogen molecule ( two white balls and a toothpick.)

Test Biodegradable Products in an indoor composter

We set up an experiment to determine the biodegradability of different plastics and substances: 

100% biodegradable plastic shopping bag

 25% biodegradable garbage bag

Cardboard

Cotton

Have you ever seen something labeled "biodegradable" or "compostable" and wondered what that means? 

Two months later we will collate the data, answer the questions  and create a graph. 

Discussion questions:

·         Which materials were the most biodegradable? 

·         Which materials were the least biodegradable?

Why do you think the water keeps its shape at the moment the balloon is popped?

Molecules in what state are strongly attracted to each other but can change positions?

Today in class we´ve investigated water on a molecular level.

We´ve recorded a video: a water balloon popping in slow motion. The water in the balloon keeps its shape when it´s popped for a few seconds.

Density rainbow

The experiment works because the liquids used have different densities. The liquids with higher densities weigh more than the liquids that are less dense. So the less dense liquids will sit on top of the denser liquids.

How to make a rain cloud

Carefully add a layer of shaving cream to the water.
The shaving cream represents a cloud and the water is the atmosphere. 

Simply add a few drops of blue food colouring to the shaving cream. The weight of the food colouring will start to push through the shaving cream and fall down through the water; (the darker grey clouds were heavy with water droplets or rain, the food colouring.

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SNOW MELTS MUCH FASTER THAN ICE CUBES

We have a lot of snow right now. It has been snowing!!!!!!

EXPERIMENT: You ONLY need water in different states.

Ice is the solid form of water amd water molecules are stacked together.

Snow that freezes into a crystallized form. (There is a lot of air around each cristal)