Define melting point, boiling point, heat conductivity. Discuss water's melting/freezing point and relate container melting point to liquid temperature.

a) What is melting point?
The melting point is the temperature at which a solid turns into a liquid as the surrounding temperature decreases.

b) What is boiling point?
The boiling point is the temperature at which a liquid turns into a gas when heat is added.

c) Which factor is important for a substance to melt or freeze?
The important factor for a substance to melt or freeze is temperature.

d) Discuss the melting and freezing point of water.
The melting point of ice (solid water) is $0^\circ\text{C}$. The freezing point of water (liquid water) is also $0^\circ\text{C}$.

e) Discuss why the melting point of a container cannot be lower than that of the liquid it contains.
If the melting point of a container is lower than the temperature of the liquid it contains, the container would melt. For example, a cup with a melting point of $70^\circ\text{C}$ cannot hold tea hotter than $70^\circ\text{C}$.

f) What is heat conductivity?
Heat conductivity, also known as thermal conductivity, is the ability of a material to conduct heat.

g) Discuss the difference between electrical conductivity and heat conductivity.
Electrical conductivity is the ability of a material to conduct electricity, while heat conductivity is the ability of a material to conduct heat. Metals are good conductors of both electricity and heat, but some materials like wood do not conduct electricity.

h) Explain if it is possible for a material to conduct heat but not electricity.
Yes, it is possible. Materials like glass or ceramics can conduct heat to some extent but are very poor electrical conductors (insulators).