Glass

What is the main ingredient in ordinary glass?

• (a) soda

• (b) lime

• (c) metal oxides

• (d) silicon dioxide

Silica in crystalline form is _____________, silica in amorphous form is ________________.

• quartz, glass

• calcite, glass

• diamond, acrylic

• glass, quartz

The compounds in glass are made of what type of bond?

• ionic

• covalent

• metallic

True or False: Glass is a usually good conductor of heat and electricity

• TRUE

• FALSE

TRUE OR FALSE Glass has a definite melting point

• TRUE

• FALSE

Fiber optics allow pulses of light to travel through the glass fiber using which principle?

• index of refraction

• radiation

• internal reflection

• radiant amplitude

Fiber optics are a better source of signal transfer...why?

• fiber optics are cheaper

• fiber optics don't break as easily

• fiber optics do not get as hot as traditional copper wires

• fiber optics don't allow other signals to interfere

Which of the following describes how to properly score a glass tube?

• use a file and saw through the glass until a scratch is made on one side of the tube

• use a file and using one direction create a scratch on one side of the tube

• use a file using one direction to create a very deep scratch on the glass all around the glass tube

• use a file to create 2 scratches right next to each other on the glass tube

What is the problem with glass that is only made of silica?

• it has too high of a melting point

• it is too reactive with other chemicals

• it costs too much

• it is rare and hard to obtain

What is the name of glass made from lightning and sand?

• photochromic glass

• silicate glass

• fullerene

• fulgurite