A scatterplot is used to represent a correlation between two variables. There are two types of correlations: positive and negative. Variables that are positively correlated move in the same direction, while variables that are negatively correlated move in opposite directions.
Thermal energy, or heat, is the energy that comes from the movement of atoms and molecules in a substance. Heat increases with increases in the speed that these particles move. Geothermal energy is the thermal energy in the earth. Motion energy is energy stored in the movement of objects
Chemical energy is a potential energy. That type of energy comes from the bonds of atoms and molecules. An example for the stored (potential) energy is the mechanical energy. Sound energy (energy of the sound) is a type of wave motion.