How are the convection currents found in Earth’s air and oceans similar?

Can someone me with these questions plz.

Freezing 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.

Which substance has non polar covalent bonds