Materials
What is the hardest natural material?
diamond
What medical thing can be put into patient's body?
implant
Which garment protects our eyes?
goggles
What other verb can be used in the following expression: "to drive a mechanism"?
to power
What are the main three types of signs?
- warning signs
- forbidding signs
- instructive signs
What do we call the alloy of copper and zink?
brass
Which verb means "to become bigger" (for example under influence of environmrnt) ?
expand
What is the name for red-and-white signs in a shape of a circle with a diagonal line?
forbidding signs
Which verb means "to change something from one form into another"?
to convert
What is a material?
It is the same as substance. It is anything that is made of matter - air, water, gas, etc
Which adjective means "difficult to shape"?
rigid
What do metals do when they are cooled?
contract
Beware of explosive materials
What do we call a special thing that we use to wind the spring of a clock-work gadget?
a crank
What does a diagonal line in the Periodic Table of the Elements show?
It separetes metals from non-metals / Separation of metals from non-metals
What do we call the material that is taken from the Earth to be processed in future?
raw material
Which materials change their colour as a result of changing acidity?
Halochromic materials
Who wears red-coloured hard hat on a building site?
safety inspector
What material is used in solar panels?
silicon
What are the 3 main advantages of SMAs?
- biocompatibility
- diverse fields of application
- good mechanical properties
What discilpine studies the wear of materials due to friction and other factors?
Tribology
What is another disadvantage of SMAs except their expensiveness?
poor fatique properties
What kind of protection does a Fir-Tree symbol on safety boots indicate?
protection against chain-saws
What can modern crank-powered radios also include, except solar panels? (name 2 things)
flashlights / emergency lights / emergency sirens
Which discipline studies the microstructures of high-temperature materials?
Ceramography