The most difficult glass riddlesChemistry quiz
Cranberry glass is made by adding ..?
Cranberry glass or 'Gold Ruby' glass is a red glass made by adding gold salts or colloidal gold to molten glass. The glass is typically hand blown or molded. Legend holds that cranberry glass was first discovered when a noble tossed a gold coin into a mixture of molten glass
The greenish tint seen on the edges of tempered glass is caused by?
The green tint found in most tempered glass is a result of iron used in the production of glass sheets, where it is added as an ingredient to act as a lubricant. In fact, except in manufacturing processes designed to minimize iron use to avoid the green tint, you’ll find that green cast in all sheets of glass–not just tempered glass
This photo has been taken at a seaglass beach in Hawai'i. How is the sea glass formed?
from lava droplets that fall to the sea during land volcano explosions
in deepwater volcano explosions
during lightning strikes
Sea glass beaches are created from years of dumping garbage into an area of coastline. Sea glass begins as normal shards of broken glass that are then persistently tumbled and ground until the sharp edges are rounded.
Glass is amorphous solid. What does it mean?
has a crystal structure
has a liquid structure
has a noncrystalline structure
has a regular structure
An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel. An amorphous solid does not have a definite geometric or crystalline shape. Glass is an amorphous solid that exhibits a glass transition.
What are these vintage glasses for?
Legend has it the shape of the glass was modelled on the breast of Marie Antoinette. The broad surface area allows the champagne to lose its carbonation more quickly, making it not suitable for the current style of very dry champagnes. It therefore fell out of fashion except for traditional occasions such as weddings, where it is often stacked in layers to build a champagne tower.
What kind of material is this cooktop made of?
Glass-ceramic materials share many properties with both non-crystalline glass and crystalline ceramics. The negative thermal expansion of the crystalline ceramic phase can be balanced with the positive expansion of the glassy phase. At a certain point (~70% crystalline) the glass-ceramic has a net expansion near zero and can sustain repeated and quick temperature changes up to 1000 °C.
A characteristic feature of hyalite glass is?
black or red color and lack of transparency
high fire resistance
black color and poor cold resistance
inability to store liquids, especially alcohols
A characteristic feature of hyalite glass is its black or red color and lack of transparency. His inventor was Georges Bouquoy, also known as Jiří Buquoy. Products made of hyalite glass were usually decorated by grinding and gold plating.
What was added to this glass to make it blue?
Powdered cobalt glass, called smalt, has been historically important as a pigment in painting and pottery. It is colored to a deep powder blue hue using cobalt ions derived from cobalt oxide. Cobalt aluminate can be used in a similar way, and is now more common, often known as "cobalt blue".