Worksheets and No Prep Teaching Resources
Worksheets and No Prep Teaching Resources
Reading Comprehension Worksheets
Rocks and Minerals
Rating Rocks

Rocks and Minerals
Rocks and Minerals


Rating Rocks
Print Rating Rocks Reading Comprehension with Third Grade Work

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Print Rating Rocks Reading Comprehension

Reading Level
     edHelper's suggested reading level:   grades 3 to 5
     Flesch-Kincaid grade level:   4.06

Vocabulary
     challenging words:    calcite, gypsum, quartz, easily, lower, talc, rocks, rate, simple, fingernail, order, describe, along, what, nail, someone
     content words:    Friedrich Mohs, With Mohs


Rating Rocks
By Cindy Grigg
  

1     What would you say if someone asked you to describe a rock in one word? You might say "hard." All rocks are pretty hard, but some are harder than others. How would you rate a rock?
 
2     Rocks are made of minerals. A German geologist named Friedrich Mohs (MOWHS) invented a scale to rate the hardness of minerals. He chose ten common minerals. He put them in order from softest to hardest and gave them numbers from one to ten.
 
3     Each mineral on the scale will scratch those with lower numbers. For example, calcite is number three on the scale. It will scratch minerals one (talc) and two (gypsum). Your fingernail can also scratch minerals with a hardness of one or two.

Paragraphs 4 to 6:
For the complete story with questions: click here for printable



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Rocks and Minerals
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