Sökning: "NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences"

Visar resultat 11 - 15 av 17 avhandlingar innehållade orden NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences.

1. 11. Evolution of the earliest molluscs

   Författare :Alexander P. Gubanov; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; historisk geologi och paleontologi;

   Sammanfattning : The first helcionelloid molluscs appeared in the late Vendian and were forerunners ofthe sudden molluscan diversification of the Cambrian explosion. The diversification ofMollusca coincided with global changes in the lithosphere, hydrosphere, atmosphere,and biosphere coincident with the break-up of the Late Proterozoic supercontinentRodinia, a distinct shift in oceanic water geochemistry, and the sudden abundance ofshelled multicellular organisms. LÄS MER

3. 12. Surface and Bulk Reactivity of Iron Oxyhydroxides : A Molecular Perspective

   Författare :Xiaowei Song; Jean-François Boily; Glenn Waychunas; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Iron oxyhydroxide; adsorption; water; carbon dioxide; FTIR; molecular resolution;

   Sammanfattning : Iron oxyhydroxide (FeOOH) mineral plays an important role in a variety of atmospheric, terrestrial and technological settings. Molecular resolution of reactions involving these minerals is thereby required to develop a fundamental understanding of their contributions in processes taking place in the atmosphere, Earth’s upper crust as well as the hydrosphere. LÄS MER

4. 13. Ion escape from Mars : measurements in the present to understand the past

   Författare :Robin Ramstad; Stas Barabash; Yoshifumi Futaana; David Brain; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mars; escape; solar wind; evolution; CME; coupling; plasma; atmosphere; Space Physics; rymdfysik;

   Sammanfattning : Present-day Mars is a cold and dry planet with a thin CO2-dominated atmosphere comprising only a few ­­­mbar pressure at low altitudes. However, the Martian surface is marked with valley networks, hydrated mineral clays, carbonates and the remains of deltas and meandering rivers, i.e. LÄS MER

5. 14. Sfärernas symfoni i förändring : lärande i miljö för hållbar utveckling med naturvetenskaplig utgångspunkt : en longitudinell studie i grundskolans tidigare årskurser

   Författare :Christel Persson; Bengt Nihlgård; Søren Breiting; Högskolan Kristianstad; []
   Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Science education; learning in environment for sustainable development; primary school; Earth System Science; Socratic dialogue; integrated learning; stimulated recall; play and learning; longitudinal study; Education; Pedagogik;

   Sammanfattning : This research deals with learning in science, including learning in environment for sustainable development. Learning in environment and sustainable development are obligatory perspectives in science as well as in other school subjects. The longitudinal study started in 2003, concerning 28 pupils nine years of age in a city in southern Sweden. LÄS MER

7. 15. Sfärernas symfoni i förändring? Lärande i miljö för hållbar utveckling med naturvetenskaplig utgångspunkt. En longitudinell studie i grundskolans tidigare årskurser

   Författare :Christel Persson; Bengt Nihlgård; Søren Breiting; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Science education; Learning in environment for sustainable development; Primary school; Earth System Science; Socratic dialogue; Integrated learning; Stimulated recall; Play and learning; Longitudinal study; NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : Symphony of the spheres in change? Learning in environment for sustainable development in primary school with a scientific and longitudinal approach.This research deals with learning in science, including learning in environment for sustainable development. LÄS MER