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By observing patterns of inheritance, recessiveness or dominance can be hypothesized.
Methods Rocks in the 4-5 Ga range may be dated by measuring ratios of isotopes of uranium/lead, rubidium/strontium, potassium/argon, argon/argon, and neodymium/samarium.
We report on how one of these sites, the Virtual Courseware Project ( was used to engage students in an inquiry-based study of the principles of genetic inheritance.
About the project The Virtual Courseware website has a free suite of activities for both the life science laboratory and Earth science field studies that can be used by students ranging from middle school to high school, or in the college classroom.
Meteorites Meteorites are pieces of the primordial solar system.
They formed at the same time as Earth and the other planets.
One way to judge the reliability of a radiometric measurement is to compare the results of different measurement techniques for the same sample.