Why is glass transparent?
Why is sand not transparent but glass is transparent?
How does sand turn into glass? How glass is made from sand? What kind of sand is used to make glass? How is glass made transparent with non transparent components? We can make glass out of sand, can we make sand out of glass again? What is the difference between silica gel and sand? Is sand and water a homogeneous mixture? Is transparent a color? What is the difference between silica and quartz sands? Why are sand and mud different in their properties? What is polymeric sand? Where in Asia will I find white sand and crystal clear blue water? If glass is considered a solid material - how can we see through it? What is transparent color? How can you see through glass when it's a solid? Why is sea water blue while water in a glass is colorless? Which sand is better for the purpose of construction? Why do people mine sand from river when they find sand in beaches? Why does snow appear white in colour while water is transparent / colourless? What is the cohesion value for sand and loose clay? Why does hot glass break when it comes in contact with cold water? Are there more stars than grains of sand? Why are white surfaces not mirrors? What is translucent powder? What does it do? Which material sticks to glass? Is it safe to use M sand instead of river sand in construction of houses? Why are coral reefs beautiful?  What material sticks to glass? Are beaches always open? Why or why not? Which type of sand is used in concrete?