particle

I have been watching sunlight through the classroom window and have noticed a tiny particle floating in the air . It moved slowly and changed direction when the breeze from the door started , which made the scene calm and interesting . Although the particle was invisible at first , it became clear when the light hit it . If I were to study this further , I would set up a simple experiment to measure how air currents affect small particles . The activity felt practical and peaceful , and it helped me understand how scientists observe tiny parts of the world .