material made from up and down quark
but we have four more quark
what they are do??
They make other materials.
Apart from the inner regions of neutron stars, they are not stable in our universe. They played an important role in the early universe, however.
We see these quarks in many mesons and also deduce their existence from some interactions.
An up or a down quark paired with a strange quark (incl antiparticles) gets you a kaon.
The charm quark-antiquark pair forms the J/ψ meson.
The B-meson includes the bottom quark.
mfb is correct, they do not make stable particles.
The top quark forms are so unstable they don't appear at all.
Just google for the name of the quark you are looking for and you'll find all the examples you can hope for. The wikipedia pages have a potted history telling you what was so special ... i.e. what is so strange about strange particles.
Separate names with a comma.