We care about matter

 

                                We care about matter

1. What is matter?

2. What is density?

3. What is flotation?

When we put an object into a liquid, if the density of the object is lower it will float. On the other side, if the density is higher it will sink. The density of water is 1gr/cm3

4. Air composition

The air is a mixture of gases that  make up the atmosphere.  It is vital for the animal and plants respiration.

5. Friction