Chem Matter - Glass

What is the primary ingredient used to make glass?

• Carbon dioxide

• Silicon dioxide

• Calcium carbonate

• Sodium chloride

How many of the 20 famous experiments mentioned in a Science Magazine article could not have been performed without glass tools?

• 5

• 10

• 15

• 20

What happens to the structure of silicon dioxide when it melts?

• It becomes a highly ordered pattern.

• It becomes a crystalline solid.

• It becomes an amorphous solid.

• It retains its original structure.

What is required for the silicon dioxide bonds to break during the melting process?

• Low temperatures

• High pressure

• High temperatures

• Chemical catalysts

What is the main component of soda-lime glass, which makes up the majority of common glass used today?

• Sodium oxide (Na2O)

• Calcium oxide (CaO)

• Silicon dioxide (SiO2)

• Lead(II) oxide (PbO)

What is the purpose of adding fluxes to the sand during the glass-making process?

• To increase the melting point of the sand

• To make the glass more transparent

• To decrease the melting point of the sand

• To make the glass stronger

What is the result of adding sodium carbonate (Na2CO3) to sand in the glass-making process?

• It creates soda-lime glass.

• It increases the glass's transparency.

• It makes the glass more brittle.

• It changes the color of the glass.

What is a characteristic of glass that differentiates it from crystalline solids?

• Glass has a regular internal crystalline structure.

• Glass is always opaque.

• Glass has an irregular atomic arrangement.

• Glass is a good conductor of electricity.

What natural event can lead to the formation of fulgurites?

• Volcanic eruptions

• Meteor impacts

• Lightning strikes

• Earthquakes

Which type of natural glass is formed when lava with a high silica content cools?

• Tektites

• Fulgurites

• Obsidian

• Natural diamonds