Review questions topics 16-18 (q&a)
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This document contains a series of review questions about science topics 16-18 from a P4 science workbook. The questions cover topics such as the moon illusion, properties of the sun, Earth and moon, and the relative sizes of planets like Jupiter and Saturn compared to Earth. No answers are provided to the 10 questions asked.
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We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
The debris of the ‘last major merger’ is dynamically young
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
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Review questions topics 16-18 (q&a)
- 1. Topics 16-18 Questions Science SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014
- 2. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 Q. 1 Q. 2 sun Earth moon (c) A pyramid (b) Cairo (a) The moon (e) The Earth (d) The sun
- 3. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 Q. 3
- 4. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 Q. 4 This is the moon illusion and is caused by the way our eyes focus on distant and close objects. The overhead moon lacks visual cues that tell us how far away the moon is, so we focus on the moon as if it was a short distance away.
- 5. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 Q. 5
- 6. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 Q. 6 Q. 7
- 7. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 Q. 8 Q. 9
- 8. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 Q. 10 Jupiter Earth Saturn
- 9. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 THE END
- 10. Review Questions SAC – P4/SciencePB/Wendy Wallace Zerafa/Mar2014 Topics 16-18 THE END