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Convection

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Submitted By ahsanur
Words 666
Pages 3
Convection Current Lab by: Kamil Ahmed
Draft
Title: The Effect of Convection Current on Plate Tectonics

Problem: How Do Differences in Temperature Cause Convection Currents?

Background Information: * The earth is made of up different layers (crust, mantle, outer core, inner core). Each of these layers has distinct properties. * The continents are part of large lithospheric plates that have moved over geological time and continue to move at a rate of a few centimeters per year. One theory is that convection currents within earth’s mantle drive this plate motion. * Convection currents are caused by the very hot material at the deepest part of the mantle rising, then cooling and sinking, and then heating and rising again. This cycle is repeated over and over. The movement from convection moves the crustal plates on top.

Hypothesis: If two temperatures are together then the warmer temperature will rise because it is less dense thus it will cause convection to reaction.

Variables: Independent variable – Temperature of h20 Dependant variable - Movement of the water (rising and falling.)

Materials: Warm water, cold water, 2 plastic cups, 1 plastic syringe, 1 plastic cup with circular depression, 1 small vial with 2 holed cap, 1 bottle of red food coloring, paper towels, and/or a sponge.

Procedure: 1) Fill two plastic cup one with warm water and the other with cold water. 2) Snap the small vial (cap-side up) into the base of the plastic cup, as shown. 3) Gently remove the cap and place 1 drop of food coloring into the bottom of the vial (Don’t make any movement in the water as you insert and remove the pipette. Slowly release one very small drop). Carefully and firmly re-cap the vial with the 2 holed cap. 3) Use syringe to carefully fill the vial with about 5 ml of water. Gently tap the vial to remove any

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