Bettina spoke into a microphone during the school play to increase the sound of her voice so the audience could hear her speak. the loudness of bettina’s voice was changed by what type of energy?

What three natural resources are found in the great lakes region

Compare and contrast physical changes with chemical changes.

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.