Four students are carrying out different laboratory procedures.
1) Piroja is mixing baking soda and vinegar to see if it reacts.
2)Jason is heating salt water over a burner until the water evaporates.
3) Kali is putting crushed ice and ice cubes on a table to see which melts first. 4)Francisco is separating iron filings from sand using a magnet. Which experiment relies on convection?

a. Piroja’s experiment
b.Jason’s experiment
c)Kali’s experiment
d)Francisco’s experiment