Beaker tongs are used to pick up beakers after they have been heated so you do not burn yourself with the ex

Test tube tongs are used to pick up test tubes once it has been heated or incase a chemical overflows during a reaction and spills on the side of the test tube. This prevents 

The wire gauze is placed over the ring clamp on the ring stand in order to have a flat surface for heating substances inside flasks or beakers.

A clay triangle sits on top of the ring clamp and provides just enough space inside a crucible can sit in the triangle to be heated. This keeps the crucible from falling through the holes and breaking and it prevents having to hold the crucible over the bunsen burner.

A ring stand used many different clamps in order to heat substances over a bunsen burner without having to hold them there. This prevents many burns from taking place.

A bunsen burner sits under the clamps of the ring stand to provide the heat in order to heat substances.

A test tube clamp is one of the clamps used on the ring stand to hold a test tube in place over the bunsen burner rather than having to hold the test tube over the flame by hand or tongs.

A ring clamp is capable of holding different things, with the use of a clay triangle or wire gauze, to be heated over the bunsen burner.

A mortar is used to hold a substance that needs to be crushed and a pestle is used to crush the substance inside the mortar.

A crucible is used to heat high temperature substances while in the lab, including metals.

Crucible tongs are used to pick up a crucible once it has been heated or to remove the hot lid in order to avoid burning yourself.

A test tube rack is used to hold test tubes while performing experiments, so the chemicals will not spill and cause harm to anyone in the lab.