If science is all about theories and no experiments, then students will never find them interesting. If you want to ensure that students become science lovers then teach them science through various experiments. After each experiment, you can ask questions or answer doubts of the students. The following are few experiments that will definitely make students want to learn science at a science tuition centre for primary school .
Pour tap water into a glass until it is half full. Put lots of salt and stir continuously. Then slowly put tap water into the glass until it is nearly full. Just ensure that you do not disturb the salty water mixed below. Slowly place the egg into the water and enjoy the surprise on the faces of the students. Then take another glass and pour water into it until it’s half full after which you place the egg in it. Once they see the difference, explain how due to the salt water the density of the egg has become lesser than that of the former.
Tornado in a bottle
Take a see-through plastic bottle with a water-tight cap. Fill it water until its 3/4th full. Add dishwashing liquid and glitter so that it is clearly visible for the student. Turn the bottle upside down and start rotating it. Explain how the formation of the vortex in the bottle is due the gravitational towards the centre.
Blowing balloons with CO2
Stretch a balloon and keep it ready for blowing. Take a see through bottle and pour a little water in it. Add a spoon of baking soda and stir until dissolved. After this the process is rather quick, so explain it to the students beforehand. Pour lemon juice and immediately put the balloon at the mouth of the bottle. In this process, the baking soda is the base whereas lemon juice is the acid. When you combine these two, it creates carbon-di-oxide which inflate the balloon
Oil and water mixing
Take a see through bottle and pour water until it is half full. If you want, you can add a food colouring in the water. Now, slowly put three spoons of cooking oil into the water. Close the bottle and shake it hard. Allow the water to settle down and show how the oil floats on water at the end of the experiment. In this process, since the molecules in the water and oil are only attracted to their kind, they will not mix. As a result, the students will witness notice oil which has a lesser density than water floating on top.
Greetings! I am a dancer and theater artist based in Singapore. Stage performances are interesting, exhilarating and multi-dimensional. I love to share what I have learnt over the past few years to the children and adults around me. I hope you enjoy the snippets of stories that I share on this channel.