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.
To hold test tubes. LOL
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According to the American Heritage Dictionary of the English Language, a test tube is a "clear, cylindrical glass tube usually open at one end and rounded at the other, used in laboratory experimentation."A test tube can be used to store chemicals that are dangerous to skin,or be connected to other lab equipment for experiments. In this case, it is usually to collect a useful product.
the use of test tube is when you have an experiment it is very use ful because you can use it as an xperiment or chemical containers!
Many uses as a vessle container) just like a cup but better for heating solutions in. and centrifuging. Make good crack cookers or pipes too
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).
To hold your test tubes in, or to keep them upright.
Test tube brush=use for cleaning test tubes
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.
Test tube holders are for after you take blood and if u have a test tube that has the clot activator in it, it has to sit for 30 mins so the blood can clot, once it clots you spin it down and you get the serum that is inside
a test tube rock is used to measure liquids
Very simple, place the test tubes in the holder.
used to chemical test
To hold test tubes. LOL
test
Chemists, biologists.
used to hold small amounts of solution.