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
-Kinetic energy of random motion of molecules of a substance. Its temperature is a measure of this motion.-easier to obtain heat than to produce work-flows from a body at a higher temp. tot a body at a lower temp.