To hold your test tubes in, or to keep them upright.
A test tube rack is used to hold up test tubes. This is so they do not tip over and spill what is in them.
A test tube rack is used to hold test tubes upright to keep them from spilling.
A test tube rack is used to hold test tubes upright to keep them from spilling.
no.
A test tube holder is a device to ...wait for it...hold test tubes ! ;-) Usually a rack or clamp that keeps them upright (& full if in use).
the answer is none
A test tube holder or rack is used in a laboratory to hold or support test tubes containing chemicals or other contents awaiting further operations. Although it is called a test tube holder, it is also used to hold/support pipettes, etc. Since a test tube has a rounded bottom, it cannot stand by itself; the rack is a convenient and necessary piece of laboratory equipment for the storage of test tubes.
Test tube rack
It is a rack made of wood or metal used to keep test tupes organized and steady.
test tube is where u keep ur filled or unfilled test tube during experiment.
used to place the test tube . :D hahaha
I think the test tube rack is used to hold any amount of chemical or liquid during an experiment.