This is an activity about telescopes. Learners will first measure several circles to determine their diameters and calculate their areas. Afterwards, they will cover each circle entirely with pennies and record how many pennies are needed for each circle size. The concept to be explored is that a telescope with a larger lens or mirror is able to collect more light than another telescope with a smaller-diameter lens or mirror. This is Actividad 10.2 as part of El Universo a Sus Pies, a Spanish-language curriculum, available for purchase.


  • Mathematics > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12


Grade 7,Grade 6,Mathematics:Data collection, analysis and probability,Grade 4,Grade 5,Mathematics:Geometry,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-115,Upper Elementary,Middle School,Mathematics:Problem solving,Physical sciences:Light and optics,Astrophysics,Elementary School,Space Science,Vocational/Professional Development Education,Mathematics:Measurement,oai:nsdl.org:2200/20140407123855149T,Mathematics,Physics,NSDL


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