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Of what material were the first football helmets made?

• Wood
• Leather
• Tin
• Wool

The 1920s marked the first time that helmets were widely used in the sport of football. These helmets were made of leather and had some padding on the inside, but the padding was insufficient and provided little protection. In addition, they lacked face masks. As a result, injuries were very common. Early helmets also absorbed a lot of heat, making them very uncomfortable to wear.

Source: Wikipedia

Which of these is another name for bulletproof glass?

• Tinted glass
• Stained glass
• Security glass
• Frosted glass

Bulletproof glass is technically termed ballistic glass or bullet-resistant glass (BR glass), but also known as security glass, safety glass, or armored glass. It refers to various types of optically transparent materials that resist penetration by bullets. Bulletproof glass is usually made from a combination of two or more types of glass, selected for different properties such as hardness and elasticity. When impacted, the laminated layers of glass behave differently, the harder layers stopping the projectile while the softer more elastic layers flex, absorb energy and prevent shattering.

Source: SILATEC

Materials that electricity flows through are known as what?

• Alloys
• Dynamics
• Conductors
• Reactors

In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge (electric current) in one or more directions. Materials made of metal are common electrical conductors. Electric current is generated by the flow of negatively charged electrons, positively charged holes, and positive or negative ions in some cases.

Source: Wikipedia

What material was used to build the Eiffel Tower?

• Silver
• Glass
• Concrete
• Iron

The iron that makes up the Eiffel Tower's structure came from the Pompey forges (East of France). The iron plates and beams produced through the puddling process were then preassembled in the Eiffel factories in Levallois Perret using rivets. Finally, these pieces were taken to the Eiffel Tower construction site to be mounted. The prefab system is what allowed them to build the Eiffel Tower in a record time of 2 years, 2 months, and 5 days.

Source: Tour Eiffel Paris

Which material makes non-stick pans non-stick?

• Wood
• Glass
• Aluminum
• Teflon

Nonstick cookware, such as frying pans and saucepans, gets coated with a material called polytetrafluoroethylene (PTFE), commonly known as Teflon. Teflon is a synthetic chemical made up of carbon and fluorine atoms. It was first created in the 1930s and provides a nonreactive, nonstick, and almost frictionless surface. The nonstick surface makes Teflon-coated cookware convenient to use and easy to clean. It also requires little oil or butter, making it a low-fat way to cook and fry food.

Source: Healthline

What is the basic material used in pottery?

• Copper
• Clay
• Iron
• Wood

Pottery is one of the oldest and most widespread of the decorative arts, consisting of objects made of clay and hardened with heat. The objects made are commonly useful ones, such as vessels for holding liquids or plates or bowls from which food can be served. Clay, the basic material of pottery, has two distinctive characteristics: it can be molded and will retain the shape imposed upon it, and it hardens on firing to form a brittle but otherwise virtually indestructible material that is not attacked by any of the agents that corrode metals or organic materials. Firing also protects the clay body against the effects of water. If a sun-dried clay vessel is filled with water, it will eventually collapse, but, if it is heated, chemical changes preclude a return to the plastic state no matter how much water is later in contact with it.

Source: Britannica

Which of these materials is used to make traditional dental floss?

• Wool
• Nylon
• Copper
• Rubber

From the horse hair “floss” of ancient times to the silk thread “floss” of the 1800s, floss was used by very few people until the invention of nylon floss in the 1940s. Nylon remains one of the most popular floss materials today. Nylon floss (“regular” or “traditional”) is made of multiple nylon filaments twisted together with 2.5 – 3.5 twists per inch to create one much stronger strand. Nylon works well in roomy spaces between teeth but tends to tear or shred when flossing tight spaces. Ribbon nylon floss works well when spaces between teeth are wider, and is often used for children.

Source: Dr. Rick Dentistry

What is the hardest known natural material on Earth?

• Boron
• Diamond
• Titanium Carbide
• Stishovite

According to both Mohs and Vickers scales, diamond is the hardest natural mineral on Earth. It is a solid form of carbon with an extremely rigid arrangement of atoms. It has a high refractive index and the highest thermal conductivity of any natural element. Most gem-quality diamonds form at a depth of 100 miles below the Earth’s surface, where temperatures (and pressure) conditions are incredibly high.

Source: Rank Red

Which Founding Father invented the glass armonica?

• Alexander Hamilton
• John Adams
• Benjamin Franklin
• Thomas Jefferson

One of America's Founding Fathers invented a musical instrument that inspired original scores from Mozart, Beethoven, and other greats. That instrument is the glass armonica (named after the Italian word for harmonic), devised by Benjamin Franklin in 1761. Out of all of his inventions, Franklin once said it was the one that gave him the "greatest personal satisfaction."

Source: The Wall Street Journal

What expensive material is famously stored in Fort Knox?

• Platinum
• Palladium
• Gold
• Silver

The gold vault at Fort Knox is perhaps the most famous and mysterious depository of precious metals in the world. Few people have ever seen the inside of the vault, and even fewer have had the chance to touch the gold. The gold is kept in a huge underground chamber, and the entrance is guarded by armed soldiers. The gold is also protected by state-of-the-art security systems, including motion detectors, cameras, and alarms.

Source: GMR Gold

What is the main material used in the early Egyptian pyramids?

• Marble
• Limestone
• Slate
• Basalt

During the earliest period, pyramids were constructed wholly of stone. Locally quarried limestone was the material of choice for the main body of these pyramids, while a higher quality of limestone quarried at Tura (near modern Cairo) was used for the outer casing. Granite, quarried near Aswan, was used to construct some architectural elements, including the portcullis (a type of gate) and the roofs and walls of the burial chamber. Occasionally, granite was used in the outer casing as well, such as in the Pyramid of Menkaure. In the early pyramids, the layers of stone (called courses) forming the pyramid body were laid sloping inwards; however, this configuration was found to be less stable than simply stacking the stones horizontally on top of each other.

Source: Wikipedia

Which of these materials can be recycled?

• Ceramics
• Disposable diapers
• Glass
• Polystyrene

The materials that can be recycled are glass, aluminum, plastic water bottles, metal scrap, different kinds of paper, electronics –computers, cellular phones, keyboards, batteries and other small electronic equipment, textile, wood, wire, cables, plastic product, rubber, etc. For most of it, the things we use at home are recyclable materials. But, at the same time, not all things at home can be considered recyclable materials.

Source: Conserve Energy Future

What is the main material used to make bricks?

• Clay
• Cement
• Iron
• Stone

A brick is a type of construction material used to build walls, pavements, and other elements in masonry construction. Properly, the term brick denotes a unit primarily composed of clay but is now also used informally to denote units made of other materials or other chemically cured construction blocks. Bricks can be joined using mortar, adhesives, or by interlocking. The earliest bricks were dried mudbricks, meaning that they were formed from clay-bearing earth or mud and dried (usually in the sun) until they were strong enough for use. The oldest discovered bricks, originally made from shaped mud and dating before 7500 BC, were found at Tell Aswad, in the upper Tigris region and in southeast Anatolia close to Diyarbakir.

Source: Wikipedia

What material is a hockey puck made out of?

• Rubber
• Iron
• Plastic
• Aluminium

Hockey pucks are made of vulcanized rubber and are designed to be extremely durable. An experiment from the University of Alabama back in 2014 showed a standard puck could withstand 80,000 pounds of pressure before it began completely breaking apart so you can imagine just how powerful this hydraulic press is.

Source: Sports Net

Toy balloons were first made in 1824 out of which material?

• Glass
• Bakelite
• Plastic
• Rubber

The rubber balloon was invented in 1824 by Professor Michael Faraday, to be used in his hydrogen experiments at the Royal Institution in London. Faraday made them by cutting two sheets of tacky rubber and pressing the edges together to seal them. The inside was then rubbed with flour to stop the sheets from sticking together. A year later, rubber manufacturer Thomas Hancock introduced rubber latex balloons to the market, patenting the process for pouring rubber over molds or dipping molds into latex liquid in 1830.

Source: Party Safe