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Related Concept Videos

Gravity between Spherical Bodies01:27

Gravity between Spherical Bodies

Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers.
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
Minerals01:26

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Minerals are essential nutrients that the human body needs in small amounts to work properly. They play a vital role in many bodily functions, such as building strong bones and transmitting nerve impulses. Some minerals are needed for hormone production or to maintain a normal heartbeat. Major minerals include calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium, while trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.
Conditions on Early Earth02:06

Conditions on Early Earth

Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
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Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Alkali Metals03:06

Alkali Metals

Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals

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Related Experiment Video

Updated: Jun 8, 2026

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
11:50

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions

Published on: June 13, 2015

Highly silicic compositions on the Moon.

Timothy D Glotch1, Paul G Lucey, Joshua L Bandfield

  • 1Department of Geosciences, Stony Brook University, Stony Brook, NY, USA. tglotch@notes.cc.sunysb.edu

Science (New York, N.Y.)
|September 18, 2010
PubMed
Summary

Lunar "red spots" reveal unique silica-rich rocks, distinct from typical lunar geology. These findings suggest past volcanic activity and evolved magmatic processes on the Moon.

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Last Updated: Jun 8, 2026

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

Area of Science:

  • Lunar geology
  • Planetary science
  • Spectroscopy

Background:

  • The Moon's surface composition is primarily understood through mare basalts and anorthositic highlands.
  • Previous remote sensing observations identified unusual spectral features in localized lunar regions, termed "red spots."

Purpose of the Study:

  • To analyze the spectral characteristics of lunar "red spots" using mid-infrared data.
  • To determine the mineralogical composition of these regions and their geological implications.

Main Methods:

  • Utilized data from the Diviner Lunar Radiometer Experiment.
  • Analyzed mid-infrared spectra of four distinct lunar "red spots."
  • Compared spectral signatures with known mineral compositions and lunar surface materials.

Main Results:

  • The "red spots" exhibit spectral signatures consistent with quartz, silica-rich glass, and alkali feldspar.
  • These lithologies indicate the presence of evolved, silica-rich rocks, akin to lunar granites.
  • The spectral data clearly differentiate these regions from surrounding mare, highlands, and pure plagioclase feldspar compositions.

Conclusions:

  • The spectral and geological evidence points to both extrusive and intrusive silicic magmatism on the Moon.
  • Basaltic underplating is a likely mechanism for generating the silica-rich magmas.
  • These findings expand our understanding of lunar magmatic evolution beyond basaltic volcanism.