What kind of energy is released when fuels are burned?
a. chemical
b. thermal
c. electrical
d. electromagnet

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.

Stage in which a typical star has completely stopped fusion

Chemistry worksheet - i am not sure what they are asking for exactly?