Science lesson from Turkey

Introduction to Gases

Step 1: students wave their hands in front of their faces - they cannot see air but they can feel a breeze.

Step 2: we spray some perfume. Pupils raise their arms when they can smell it.

Step 3: students blow air into a plastic bag - air takes up space. 

Step 4: students wave a sound tube - sound vibrations are transmitted through air.

We learnt: air cannot be seen but you can feel it. Perfume can be diffused through it and sound vibrations can be transmitted through air - therefore air exits and takes up space!

Step 5: We put a candle in a container and pour water into it.

Step 6: we light the candle and put the open end of a glass over it.

We learnt: the flame goes out and the water level in the glass rises. The candle burns until it uses up all the oxygen.