To hold the test tubes orderly to easily identify them.
testtube
in chemistry
It is a rack made of wood or metal used to keep test tupes organized and steady.
Staining rack is used to hold many glass slides at a time. By putting slides on a staining rack, you can pour dye simultaneously and it will help to reduce extra dye or stain.
Organic chemistry
Test Tube racks are used in Chemistry to store and hold test tubes. Because test tubes have a rounded bottom they cannot stand on thereselves, therefore the rack holds and stores them.
A rack that holds test tubes ....
A rack with holes which is designed to hold test-tubes.
testtube
A spatula is used to take a substance and put it f.e. in a testtube.
Test tubes are used in laboratories to store, to mix or to change the heat of chemicals.
if your a student go to the teacher and ask him/her
The rack is used to hang laundry indoors. The pulley system is used to lift the rack to a higher elevation in the room where usually the warmer air is located.
in chemistry
chemistry
A drying rack is a wooden rack with different levels of woooden or metal rods spaced at different heights. It is commonly used for drying clothes and can also be used for pasta drying or displaying crafts.
cooling rack is used for cooling your baked product after you take it out of the oven such as bread, cake, cookies etc.