https://padlet.com/jesus_zarate/2y8pvmoag36i Made with a quick smile en-us 2016-11-16 12:27:14 UTC 2025-11-08 08:03:58 UTC hello@padlet.com jesus_zarate https://padlet.com/jesus_zarate/2y8pvmoag36i/wish/138039284 Hardness: Resistance to scratching and pressure. Hardwood does not 
mark as easily as softwood. 
Strength: Amount of force needed to break a material usually by 
pushing or pulling down. 
Toughness Resistance to breaking by cracking, opposite to ‘brittle’. 
Stiffness :Amount of force needed to change the shape of a material, 
opposite to flexible. 
Elasticity: Ability to return its original shape when a force is removed 
eg rubber band. 
Plasticity: Ability to retain the new shape when a force is removed eg 
plasticene. 
Absorbency: Ability of a material to soak up a liquid. 
Waterproof Resistance to liquids, repels water. 
A material can be described in a variety of ways for example it may be 
strong but brittle, and the combination of its properties may determine 
its use. The property of a material can change according to how the 
material is treated; clay is very different once it has been fired, rolled 
up newspaper is very different to a sheet of newspaper.]]> 2016-11-16 12:39:33 UTC https://padlet.com/jesus_zarate/2y8pvmoag36i/wish/138039284 jesus_zarate https://padlet.com/jesus_zarate/2y8pvmoag36i/wish/138040386  Investigate elastic bands with older children.
Stretching them to their breaking point is too dangerous! Try
comparing different thicknesses of the same band circumference
with a fixed weight eg 500 gram. Carry out this experiment on
the floor. Hold the band and weight against a ruler to see which
stretches the most.]]> 2016-11-16 12:44:18 UTC https://padlet.com/jesus_zarate/2y8pvmoag36i/wish/138040386 jesus_zarate https://padlet.com/jesus_zarate/2y8pvmoag36i/wish/138041642  Sometimes we want a material (fabric) to 
have some elasticity because of the garment it will be used to 
make, for example, a pair of tights. Different fabrics can be tested 
for this. Strips of fabric can have 
weights hung onto them. What length is the fabric at the start? 
To what length does it stretch? What length does it return to? 
Use bulldog clips to support the weights or cut a hole in the 
fabric to hang the weights through.]]> 2016-11-16 12:49:09 UTC https://padlet.com/jesus_zarate/2y8pvmoag36i/wish/138041642