Science - Room 8

Today, my class and I went to Room 7 and 8 at our school to learn about Science. First we went to Room 8. Their topic was Sound. First we talked about matter. 
Matter is everything that has mass and occupies space. There are three states of matter - Solids, Liquids and Gases. 
Solids are something that are hard, and the molecules are packed tightly together. 
In liquids, the molecules are loosely packed.
In Gas, the molecules bounce around.
Then, we went on to the experiments. There we 5 experiments, all related to sound. Two of them involved playing water as instruments. The other experiments included communication with two cups and a piece of string, making sound with a container and rubber bands, amplifying using a balloon, and tapping/blowing on beakers and test tubes filled with different measurements of water to expose different sounds. These were the experiments that we did. These were really fun. Then we did a quiz on the mat.
I learnt that sound vibrates at different speeds, and that there are things that can alter the way sound is heard.