Referring to the figure below: What point in the graph is the phase change of melting occurring?  

Determine whether the following statement is TRUE OR FALSE: Gases have the greatest spacing between particles.

Which of the following statements is FALSE about energy changes?

Referring to the figure below: What is the boiling point of the unknown substance?

Identify the following as an element, compound, homogeneous mixture, or heterogeneous mixture: plaster= calcium sulfate (CaSO4)

Determine whether the following statement is TRUE OR FALSE: Particles in the solid state do not have any motion at room temperature.

Identify the following as a metal, nonmetal or semimetal/metalloid: lithium (Li)

Referring to the figure below: At what point(s) on the graph, is the kinetic energy changing?

Identify the following as a physical property, a chemical property, a physical change, or chemical change: Magnesium gave off light when it was burned in oxygen.

Identify the following as a physical property, a chemical property, a physical change, or chemical change: Ammonium dichromate is an orange, crystal.