science education

Exploring Nature Science Education Resource:

Life Science, Earth Science, and Physical Science Resources for K-12

Class - Sharks & Rays - Cartilaginous Fishes (Grade 4+)

The Cartilaginous Fishes (Class Chondrichthyes) include sharks, skates, and rays.

1) They are cold-blooded vertebrates.

2) Their skeleton is made of cartilage instead of bone. Cartilage is softer than bone (it makes up your outer ear or the end of your nose).

3) They breathe through gills.

4) Their teeth, on the other hand, are very hard and when they lose them, biting into tough prey, they can replace them within days. Many chondrichthyes, including sharks, make new teeth as needed their whole lives.

5) They have 2 pairs of fins, one pair in the front (pectoral fins) and one pair in back. Sharks are famous for their large dorsal fin seen above the water as they swim along the surface.

Chondrichthyes have remained almost unchanged since the time of the dinosaurs.


 

Handout

Class - Sharks & Rays - Cartilaginous Fishes (Grade 4+)

To make black and white copies for your whole class, see the copy-friendly version below:

 

Class - Sharks & Rays - Cartilaginous Fishes (Grade 4+)

Recommended Books and Products

Classification of Living Things Flip Chart Set
Each Curriculum Mastery Flip Chart is mounted on a sturdy easel and features:

    • 10 Double-sided, laminated 12" x 18" charts
   – Side 1 features a colorful, graphic overview of the topic
   – Side 2 serves as a "write-on/wipe-off" activity chart featuring questions, labeling exercises, vocabulary review & more!
• Activity Guide featuring black-line copy-masters & exercises


Set Includes the following 10 charts:

  1.    Classification of Living Things
  2.    The Animal Kingdom
  3.    Mammals
  4.    Amphibians
  5.    Reptiles
  6.    Insects
  7.    Birds
  8.    Arachnids
  9.    Sharks and Rays
  10.    Fishes
Classification of Living Things Flip Chart Set

Exploringnature.org has more than 2,000 illustrated animals. Read about them, color them, label them, learn to draw them.

cheetah, tiger, panda, fox, bear, cougar