The purpose of the study was to elicit and analyze sixth grade students' explanations concerning concepts taught in the national Indonesian sixth grade science curriculum. In this study, students were asked to identify the cardinal directions on flat maps and a globe, to describ…
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This thesis is concerned with ensuring high energy resolution from the swept charge device (SCD) CCD54, essentially a non-pixellated version of the charge coupled device (CCD), for use in the Chandrayaan-1 X-ray Spectrometer (C1XS). Of particular interest is the effect on perfor…
Sulfur is a key volatile element in magmatic systems that exists in many phases (e.g. melt or gas), in multiple-oxidation states (S²⁻, S⁴⁺ and S⁶⁺), and has more than one stable isotope (e.g. ³²S and ³⁴S). Therefore, by measuring S, information regarding the conditions of a magm…
Volcanic deposits on the Moon offer an invaluable opportunity to study its interior and geologic evolution. Volcanic materials erupted onto the surface represent samples of the interior, whose properties provide information about magma source regions at depth, conditions encount…
This thesis comprises two separate but interesting projects that attempt to constrain the internal history of planetary bodies. The first set attempts to interpret the Moon's internal thermal history from the relaxation state of lunar impact basins. As the Moon cools, impact str…
Much of what is known about the early solar system’s history, processes, and conditions are determined through the study of airless bodies. Like their terrestrial counterparts, the geologic materials of airless bodies contain information about their formative environment; these …
The ferroan anorthosite suite (FAS) is thought to contain material representing the very first lunar crust. As such, the FAS serves as the only direct sampling of the lunar magma ocean (LMO) available for study. Understanding the history of this ancient suite is paramount to fur…