How the Earth revolves around the Sun Earth orbits around the Sun in the Plane of the Ecliptic. The axis of Earth always makes the same angle with the Plane of the Ecliptic. Takes energy to organize 2. Contact, with movement 6. Exothermic, endothermic 7.
Energy degrades from higher to lower forms, like water flows downhill.
Energy degrades, until becomes low-order heat, unusable to system. Why appliances have Efficiency Ratings. Short wavelengths are scattered more, first. Makes blues Particles much smaller than wavelengths being scattered Gases 2. Makes reds Particles about the same size as the wavelengths being scattered Water molecules, dust 3.