Observing Convection currents-Science-14/9/18

AIM:To observe a convection in a liquid
EQUIPMENT: 200mL beaker, tweezers, potassium permaganate ice cube with wire attached, Bunsen burner, tripod, heat mat, straw, gauze mat.
STEP 1: Set up a Bunsen burner on a heatproof mat. Put the gauze mat on the tripod but leave it to one side of the Bunsen
STEP 2:Fill a 200mL beaker with 150mL of cold water.
STEP 3:Place the beaker on top of the tripod and allow it to settle for a few minutes.
STEP 4:Carefully insert a straw down one side of the beaker, make sure it is touching the bottom. Do not disturb the water too much.
STEP 5:Using tweezers, drop a crystal in the straw. Wait for the crystal to settle at the bottom.
STEP 6:Remove the straw.
STEP 7: Light the Bunsen and move the tripod over. Observe.