IB Design Technology Topic 4

15 terms by reedkj1 

Create a new folder

Advertisement Upgrade to remove ads

atom

the smallest part of an element that can exist chemically

alloy

mixture that contains at least one metal. This can be a mixture of metals or a mixture of metals and non-metals

molecule

two or more atoms that are normally bonded together covalently

composite

a mixture composed of two or more substances (materials) with one substance acting as the matrix or glue

density

the mass per unit volume of a material

electrical resistivity

this is a measure of a material's ability to conduct electricity. A material with a low resistivity will conduct electricity well

thermal conductivity

a measure of how fast heat is conducted through a slab of material with a given temperature difference across the slab.

thermal expansion

a measure of the degree of increase in dimensions when an object is heated. This can be measured by an increase in length, area or volume. The expansivity can be measured as the fractional increase in dimension per kelvin increase in temperature

hardness

the resistance a material offers to penetration or scratching

tensile strength

the ability of a material to withstand pulling forces

toughness

the ability of a material to resist the propagation of cracks

ductility

the ability of a material to be drawn or extruded into a wire or other extended shape

plastic deformation

the permanent deformation of a solid subjected to a stress

fibre

a class of materials that are continuous filaments or are in discrete elongated pieces, similar to lengths of thread with a length to thickness ratio of at least 80

fibre structure

a filamentous material long in relation to its width/breadth

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set