[DOC] [TLE] Elements in the Earth's Crust - Windows to the Universe [PAR] The 8 most common elements in Earth's crust (by mass): ... Together, the 
elements oxygen and silicon make up most of the Earth's crust including silicate... [DOC] [TLE] What is the most abundant element in the earth's crust? - CliffsNotes [PAR] Most of the earth's crust, or outer layer, is made up of eight elements. Oxygen 
tops the list in terms of abundance, with the planet's shell being composed of a. [DOC] [TLE] Most Abundant Element in the Universe, Earth, and Body - Chemistry [PAR] What Is the Moon Made Of? ... The most abundant element in the earth's crust is 
oxygen, making up 46.6% of the earth's mass. Silicon is the second most 
abundant element (27.7%), followed by aluminum (8.1%), iron (5.0%), ... is so 
much less than that of the other elements that its abundance comes in third, at 10
% by mass. [DOC] [TLE] 2000 - SolPass [PAR] and its moons appear on February 7 as ... the most common elements in the 
Earth's crust and the ... Iron is the most common metal in the crust. B. All eight 
elements are metals. C ... design and construction; slight to moderate in well-built 
ordinary .... Builds On: Work with rock formations begins in the second grade SOL 
and. [DOC] [TLE] Element Abundance in Earth's Crust - HyperPhysics [PAR] Given the abundance of oxygen and silicon in the crust, it should not be 
surprising that the most abundant minerals in the earth's crust are the silicates. 
Although... [DOC] [TLE] Geology of the Moon - Wikipedia [PAR] The geology of the Moon is quite different from that of Earth. The Moon lacks a 
significant ... The Moon is a differentiated body, with a crust, mantle, and core. ... 
Elements known to be present on the lunar surface include, among others, .... 
The most distinctive aspect of the Moon is the contrast between its bright and 
dark... [DOC] [TLE] What Four Elements Make Up Almost 90% of the Earth? - Synonym [PAR] Of the 92 naturally occurring elements, the Earth's geosphere -- the solid part of 
the ... Oxygen, the second most abundant element on Earth, is found mainly in 
the crust. ... up common compounds such as quartz, mica and talc, as well as rare 
stones ... Since the majority of the Earth's volume is taken up by its liquid mantle,
... [DOC] [TLE] Earth's crust | geology | Britannica.com [PAR] The chemical composition of Earth's crust, oceans, and atmosphere can be 
studied, but this is ... The origin of the Earth by the accretion of planetesimals is a 
well-founded ... Its cosmic abundance is estimated as 3.7 atoms (on a scale 
where the ... of the surface of the Earthoxygen is the most abundant element: in 
mass,... [DOC] [TLE] Planet Earth: Facts About Its Orbit, Atmosphere & Size - Space.com [PAR] Dec 11, 2014 ... Planet Earth: Facts About Its Orbit, Atmosphere & Size ... covered the land, and 
the earliest fossils of reptiles appear during this period as well. ... Oxygen is the 
most abundant element in rocks in Earth's crust, composing roughly ... as big as 
Earth's moon at some 1,600 miles (2,600 km) in diameter  is solid. [DOC] [TLE] How Was the Moon Formed? - Space.com [PAR] Jan 15, 2013 ... There are three theories as to how Earth's satellite could have been created. ... a 
moon that is the largest in the solar system in relation to its host planet. ... it less 
dense than Earth  the material that formed it came from the crust, while ... 
theory both explain some elements of the existence of the moon, they... [DOC] [TLE] Earth - National Geographic Society [PAR] Aug 26, 2016 ... Jupiter's moon Europa has a thin atmosphere rich with oxygen. ... Its diameter is 
about 12,700 kilometers (7,900 miles), and its mass is about 5.971024 ... Earth's

Question: It's the 2nd most common element in the moon's, as well as the Earth's crust
Answer: Silicon