Who first proposed the concept of free energy? a. Gibbs
b. Lavoisier
c. Dalton
d. Hess

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.