Select the correct answer from each drop-down menu.

the graph shows the heating curve of a chemical substance as it undergoes state changes from solid to liquid to gas. analyze the curve, and answer the questions.

the substance is entirely solid between positions,
a and b
b and c
c and d
d and e
e and f

particles of the substance are in the liquid state and are gaining kinetic energy between positions,
a and b
b and c
c and d
d and e
e and f

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.