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
The atoms and molecules that make up a substance are in constant motion. This movement is what gives a material its temperature: the more the molecules are moving about, the higher the temperature. Thermal energy is simply the energy possessed by a substance due to the movement of its atoms or molecules. It is important not to confuse this with heat, which is energy that is transferred from one place to another. Thermal energy has long been exploited by humans for cooking, heating, power generation and industry.