Question

explaining how and why cheese melts
kai takes a hamburger off of the grill and puts a piece of cheese on it. explain how and why the cheese melts when kai puts it on the hamburger.

Explanation:

Heat transfer occurs from the hot hamburger to the cooler cheese. This is due to the principle of heat moving from a region of higher temperature to one of lower temperature. As the cheese absorbs heat, its molecules gain energy. In the solid - state, cheese molecules have relatively fixed positions. With increased energy (from the heat transfer), the intermolecular forces are weakened. The molecules start to move more freely, and the cheese changes from a solid to a liquid state (melts).

Answer:

The cheese melts because heat is transferred from the hot hamburger (higher - temperature object) to the cheese (lower - temperature object). The heat causes the cheese molecules to gain energy. In the solid cheese, molecules have limited movement. As they gain energy, the intermolecular forces are overcome, and the molecules can move more freely, resulting in the cheese changing from a solid to a liquid (melting).