What ancient civilization is credited with developing the method of shaping molten sand into glass?

• Egyptians

• Greeks

• Romans

• Chinese

What is the primary component of sand used in glass manufacturing?

• Iron oxide

• Calcium carbonate

• Silicon dioxide

• Aluminum oxide

What happens to the molecular structure of silicon dioxide when heated to high temperatures?

• It becomes more rigid

• It loosens and becomes more fluid

• It forms a crystalline structure

• It turns into a gas

Which chemical is added to molten silica to create a strong and transparent glass material?

• Potassium nitrate

• Magnesium sulfate

• Calcium oxide

• Sodium chloride

What is the key benefit of recycling glass bottles?

• It changes the color of the glass

• It allows for endless reuse without quality loss

• It reduces the weight of the bottles

• It makes the glass more fragile