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
This form of energy is produced by the random motion of atoms and molecules of substances. The more vigorous the movement of its atoms and molecules, the hotter a substance becomes. The movement requires the input of energy-which can be in another form (other than heat) such as longer-wavelength solar energy. Heat energy can be transmitted from one body/substance to another by conduction, convection, or radiation. Heat energy can be used to perform mechanical work.