8th Grade Science Vocabulary ListQuiz Friday January 9, 2009

1. asthenia – abnormal physical weakness, lack of energy

2. primary resource –a document, speech or other sort of evidence written,

created or otherwise produced during the time under study

3. secondary resource – sources that were written about an event after it

occurred.

4. geocentric – theory of the solar system proposed by Ptolemy in which the

earth is the center of the universe

5. heliocentric – theory proposed by Polish astronomer Nicolas Copernicus

in which the sun is the central body in our solar system

6. superposition – the placing of one thing on top of the other

7. strata - distinctive beds or layers of rocks

8. unconformity – a surface that represents a missing part of the geological

column

9. geocentric column – an ideal sequence of rock layer that contains all the

known fossils and rock formations on earth arranged from oldest to

youngest

10.paradigm – a set of assumptions, concepts and values that govern our

view of reality

11.seismic – of or relating to earthquakes

12. faults- cracks in the crust of the earth