Energy and Sound

This term our topic is energy. We have been learning about the forms of energy and the conservation of energy. conservation of energy is when cannot be destroyed or created but can change its form. for example potential to kinetic energy. We have also been learning about sound, how it travels and pitch of sound. We found out that sound travels better through solids and liquids than in air. We did some experiments to help us understand like tying string around a spoon or knife and them wrapped the string around our fingers, put it in our ears and them hit it against the desks. It sounded like wind charms hitting together.

We also put a speaker into black rubbish bag and but liquids on the bag and them put some music through the speakers. this experiment helps us understand that sound travels through vibrations. We learnt that sound travels at 332 metres per second through air and light can go around the world seven times in one second. We did a experiment were we stood at one end of the field and Mr M stood at the other end, he clapped some wooden blocks together and we had to observe and see if we could see the blocks clapped together before we could hear the noise. This experiment proves that sound takes a while to reach your ears.

I wonder how radio waves are different to sound waves. Some interesting things we found out was that thunder and lightning happen at the same time but light travels faster than sound and a sonic boom happens when something goes faster than the speed of sound.