Today in science we were working on changing matter with heat.  We wanted to see what would happen when we heated a popcorn kernel. 
"The kernel exploded." Ellorie
"The oil in the test tube bubbled before the kernel popped."Jacob
"The foil on the top of the test tub help trap the heat and made the kernel pop." Laura
The corn and the popcorn were both solids but the heat changed the properties of the solid.