Scale - Mystery Photos (Sara Wilson)
Author
Sara Wilson
Principle(s) Illustrated
Scientific scale
Microscopy/Magnification
Standards
7.5.a - Students know plants and animals have levels of organization for structure and function including cells, tissues, organs, organ systems and the whole organism.
1.1.2 - Science Standard
1.1.3 - Science Standard
Questioning Script
Prior knowledge & experience:
They need to know that microscopic organisms exist.
If they have had the opportunity to work with microscopes/satellite images before that would be useful.
Powers of 10 video may be helpful for understanding too.
Root question:
What is important to know when viewing images and working with science concepts?
Target response:
Science images are all about scale. You need to know the size of an object and when taking a photograph scale helps to identify what you are viewing.
Common Misconceptions:
Students often believe that microscopic objects are all the same size. (Bacteria, Ameoba and atoms are all the same size and can be seen under a microscope)
Students often believe that all microscopes are the same and all cells can be seen in a traditional light microscope.
References
Nikon Small World Website - Has contests for photographers of microscopic objects.
Photographs and Movies
Scientific American Article - Contest of microscope photography.
Wired Science Article - Includes information about the last 35 years of microscope photography.
Visible Earth/NASA - Images of Earth from satellites above.
NASA Earth Observatory - Image of the day from NASA satellites.
Scale of the Universe - Site with a sliding scale showing relative size of different objects.