Abundance of the chemical elements in the Sun and outer planets is similar to that in the universe. Due to solar heating, the elements of Earth and the inner rocky planets of the Solar System have undergone an additional depletion of volatile hydrogen, helium, neon, nitrogen, and carbon (which volatilizes as methane). The crust, mantle, and core of the Earth show evidence of chemical segregation plus some sequestration by density. Lighter silicates of aluminum are found in the crust, with more magnesium silicate in the mantle, while metallic iron and nickel compose the core. The abundance of elements in specialized environments, such as atmospheres, or
See You at the Pole pending), the ACLU alleged that a parent group promoted the SYATP event and a National Day of Prayer with support from the school. Support for SYATP was one of several religious endorsements alleged in the case, along with sing-along prayers, hymns, and a Nativity play. After SYATP rallies are events which usually take place the evening of SYATP. These rallies are sponsored by local churches or local youth ministry networks and generally include one or more of the following elements: Contemporary Christian Music concert, worship, testimonies, drama, and/or a speaker. See You at the Pole See You at the Pole