The Bridge V Learning Edition 1 ; our solar system | Page 60

in a process called "ram-pressure stripping." This process quickly converts a gas-rich spiral
galaxy into a gas-poor lenticular galaxy. Spiral galaxies have a hard time surviving in the
superheated gas environment.
As you see, galaxies change and evolve over time, and galaxies we observe in the nearby
universe today have had a very long history already.
Additional activity
Once students know about the shapes of galaxies, they can contribute to a real scientific
research project by exploring the Galaxy Zoo citizen science programme: http://www.space-
awareness.org/fr/games/galaxy-zoo/
CURRICULUM
Space Awareness curricula topics (EU and South Africa)
Our wonderful Universe, Galaxies
National Curricula USA
Next Generation Science Standards, content Standard in 9-12 Science as Inquiry (Abilities
necessary to do scientific inquiry, Unders and Content Standard in 9-12 Earth and Space Science
(Origin and evolution of the universe)
National Curricula UK
GCSE, KS3 ,A level: Physics - Edexcel; OCR A; WJEC
CONCLUSION
Students identify the galaxies by making calculations, working through the worksheets and
drawing a hypothesis about the morphology-density effect.
This resource was selected and revised by Space Awareness. Space Awareness is funded by the
European Commission's Horizon 2020 Programme under grant agreement nº 638653
www.space-awareness.org