. Which of the following investigations would be most helpful in allowing students to investigate the process of convection?

A. Students will crack open eggs on the sidewalk outside of their school at various times during the day. Students observe the changes in the egg color over a time of 5 minutes.

B. Students place yellow hot water on one side of a container and blue cold water on the other. Students then release a divider that separates the two sides and observe how the two types of water mix.

C. Students will place rods made of various materials on hot plates. Students place one end of the rod on the hot plate and record the temperature of the other end of the rod over a period of three minutes.

D. Students place digital thermometers at various distances from a heat lamp. Students then record the temperature of the air at each distance on their data table.