Exploring the World of Glass

What is the main ingredient used to make glass?

• Clay

• Sand

• Plastic

• Wood

What ancient civilization first shaped glass by blowing air into it?

• Syrians

• Romans

• Egyptians

• Greeks

What does adding soda to silica do?

• Increases its weight

• Makes it colorful

• Makes it transparent

• Lowers the melting point

Why is lime added to the glass mixture?

• To change its color

• To solve the solubility problem

• To make it smell better

• To increase melting point

What is the effect of adding lime to glass?

• Makes it colorful

• Decreases its melting point

• Reduces its durability

• Solves solubility issues

What type of glass is resistant to heat changes?

• Fiberglass

• Tempered glass

• Borosilicate glass

• Soda lime glass

What is the main purpose of adding boron oxide to glass?

• To make it soluble

• To resist temperature changes

• To enhance its beauty

• To make it heavier

What metal is not recommended for coloring glass due to radioactivity?

• Chromium

• Gold

• Uranium

• Iron

What effect does a fuel-rich flame have on glass?

• Makes it expand

• Gives it a mirror-like quality

• Turns it opaque

• Makes it break easily

What can cause red light to scatter in glass?

• Gold nanoparticles

• Sodium carbonate

• Silica

• Calcium carbonate