Worksheets and No Prep Teaching Resources
Worksheets and No Prep Teaching Resources
Reading Comprehension Worksheets
Rocks and Minerals
Other Ways of Determining Age

Rocks and Minerals
Rocks and Minerals


Other Ways of Determining Age
Print Other Ways of Determining Age Reading Comprehension with Sixth Grade Work

Print Other Ways of Determining Age Reading Comprehension


Reading Level
     edHelper's suggested reading level:   high interest, readability grades 6 to 8
     Flesch-Kincaid grade level:   6

Vocabulary
     challenging words:    correlate, correlation, Unconformities, unconformity, igneous, intrusion, sedimentary, organism, magma, geologists, elsewhere, harden, evidence, itself, shift, determine


Other Ways of Determining Age
By Patti Hutchison
  

1     Uplifting, tilting, folding, and faulting. Sedimentary rock layers are often disturbed by forces within the Earth. This makes them difficult to study. The law of superposition does not always apply. How do scientists determine age under these circumstances? There are many methods.
 
2     Older layers of rock are often exposed at the Earth's surface. They are weathered and eroded. New sediments are deposited on top. They harden to form new sedimentary rock layers. This is an example of an unconformity.
 
3     Unconformities cause a gap in the ages of the rock layers above and below them. There is also a gap in the ages of the fossils these layers contain. This evidence tells scientists when and where changes have happened on the Earth's surface.
 
4     Scientists also study faults to help them know when changes in the Earth have occurred. A fault is a crack in a rock. Movement can take place at a fault. Rock layers on one side may shift up or down from the rock layers on the other side.

Paragraphs 5 to 11:
For the complete story with questions: click here for printable



Weekly Reading Books

          Create Weekly Reading Books

Prepare for an entire week at once!


Feedback on Other Ways of Determining Age
Leave your feedback on Other Ways of Determining Age  (use this link if you found an error in the story)



Rocks and Minerals
             Rocks and Minerals


More Lessons
             Special Education Science Materials for Teachers


Science
             Science


    Careers in Science  
 
    Caring for Earth  
 
    Clouds  
 
    Dinosaurs  
 
    Earth's Land  
 
    Earth  
 
    Earthquakes  
 
    Electricity  
 
    Energy  
 
    Erosion  
 
    Food Pyramid  
 
    Food Webs and Food Chain  
 
    Forces and Motion  
 
    Fossils  
 
    Health and Nutrition  
 
    How Things Work  
 
    Landforms  
 
    Life Science  
 
    Light  
 
    Magnets  
 
    Matter  
 
 
    Moon  
 
    Natural Disasters  
 
    Photosynthesis  
 
    Plant and Animal Cells  
 
    Plants  
 
    Rocks and Minerals  
 
    Science Process Skills  
 
    Scientific Notation  
 
    Seasons  
 
    Simple Machines  
 
    Soil  
 
    Solar System  
 
    Sound  
 
    Space and Stars  
 
    Sun  
 
    Tsunami  
 
    Volcanoes  
 
    Water Cycle  
 
    Water  
 
    Weather  
 



Copyright © 2017 edHelper