Abstract:
This investigation provides an opportunity to use data collected by scientists who are working on the cutting edge of space science. In a science classroom, the investigation can be tied in with a unit on basic atomic structure, states of matter, or space science. In a mathematics (algebra) classroom, the investigation may be used to show a practical application of logarithmic plots. The learner will be asked to interpret fluxes (rates of particle flow) for cosmic ray isotopes and draw conclusions about the source of the particles. Their are two accompanying Educational Briefs. The first provides an explanation of basic atomic structure and explains the Advanced Composition Explorer (ACE) mission. It is the "Composition of Matter, Atomic Structure" Education Brief. The second provides an explanation of the Big Bang, the fusion process, and the evolution of stars, and it is the "Cosmology and Stellar Evolution" Education Brief.


Outcome:

• The learner will access plots of ACE/SIS instrument data to compare fluxes (rates of particle flow) for lower and higher energy cosmic ray isotopes of carbon, nitrogen, and oxygen.
  
• The learner will draw conclusions about the source of the lower and higher energy cosmic ray isotopes of carbon, nitrogen, and oxygen.
  
• The learner will access plots of ACE/CRIS data representing fluxes (rates of particle flow) for higher energy cosmic ray isotopes of carbon, nitrogen, and oxygen.
  
• The learner will draw conclusions about the source of the cosmic ray isotopes measured by SIS compared to those measured by CRIS.
  
• The learner will be able to read logarithmic plots that summarize data from real-world scientific research.
  

Suggested Grade Level & Duration:
Grades 9-12; 1 fifty-minute periods.

Materials:
The learner will need a computer with internet access and an attached printer to print a copy of the procedure for the investigation if so desired.