German Silver is an alloy of , sometimes also containing lead and tin. It was originally named for its silver white colour, but the term is now prohibited for alloys not containing that metal

The Sun is the primary source of energy for Earth`s climate system is the first of seven Essential Principles of Climate Sciences. Principle 1 sets the stage for understanding Earth`s climate system and energy balance. The Sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible. Each second, more than four million tonnes of matter are converted into energy within the Sun`s core, producing neutrinos and solar radiation.