Worksheets and No Prep Teaching Resources
Worksheets and No Prep Teaching Resources
Reading Comprehension Worksheets
Invertebrates
Mollusks

Invertebrates
Invertebrates


Mollusks
Print Mollusks Reading Comprehension with Sixth Grade Work

Print Mollusks Reading Comprehension


Reading Level
     edHelper's suggested reading level:   grades 6 to 8
     Flesch-Kincaid grade level:   6.51

Vocabulary
     challenging words:    cephalopod, cephalopods, filter-feeders, gastropod, quarter-million, scallops, weavings, coating, internal, complexity, bores, wampum, classify, siphon, valuable, mantle
     content words:    Native Americans, Native American


Mollusks
By Cindy Grigg
  

1     Mollusks are invertebrates (animals without a backbone) with soft bodies. Their bodies are not divided into different segments or parts. Mollusks often have a hard outer shell to protect their bodies. All mollusks have a thin layer of tissue called a mantle which covers their internal organs. The mantle produces the mollusk's shell. Clams, oysters, snails, and octopuses are all mollusks.
 
2     Mollusks live nearly everywhere on Earth. Most live in water, but some live on land, usually in damp places. Most mollusks move with a muscular structure called a foot. The feet of different kinds of mollusks are adapted for different uses, like crawling, digging, or catching prey. Many mollusks have an organ called a radula (RAD you lah), which is a flexible ribbon of tiny teeth. The tiny teeth scrape food from a surface, such as the surface of a leaf. A radula may have as many as a quarter-million teeth!
 
3     Biologists classify mollusks into groups based on physical characteristics. Some of these characteristics are the presence of a shell, the type of shell, the type of foot, the arrangement of teeth in the radula, and the complexity of the nervous system. The three major groups of mollusks are gastropods, bivalves, and cephalopods (SEF ul o pods).

Paragraphs 4 to 8:
For the complete story with questions: click here for printable



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Invertebrates
             Invertebrates



Animals
    Amphibians  
 
    Birds  
 
    Deserts  
 
    Fish  
 
    Freshwater  
 
    Grasslands  
 
    Insects  
 
 
    Invertebrates  
 
    Mammals  
 
    Oceans  
 
    Polar Regions  
 
    Rain Forest  
 
    Reptiles  
 



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