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Activity

Teeth in herbivores, carnivores and us

Summary: 
Compare teeth from herbivores and carnivores, using real jaws if possible. Or just use the jaw of one kind of animal, as part of another lesson.
Science content (2016 curriculum): 
Biology: Features, Adaptations of Living Things (K, 1, 3, 7)
Biology: Evolution, Natural Selection (7)
Materials: 
  • optional: mirror (see notes)
  • animal jaws if possible
  • illustrations of different categories of teeth
Procedure: 

An animal's teeth an adaptation for the food that it eats.

Herbivore’s teeth:
(Photo shows lower jaws of herbivores, from top to bottom: moose, vole, deer.)
Plants are tough. Herbivores have teeth that are adapted to smash them up and get the energy out of them.
To snip off the plants stems herbivores use incisors at the front of the jaw (these are often missing from a found jaw).
To grind the plants they use their molars, which have sharp ridges on the top and fit together perfectly to smash the plant cells open.

From my deer skeleton: put the deer jaws in the skull to show how tightly the teeth fit together to crush the plants. Show how the jaw moves sideways to mash the plants between the teeth.
3D view of teeth in a mouse skull: https://www.youtube.com/watch?v=oLn70NiouS4

Carnivore’s teeth:
Carnivores need sharp teeth to catch prey and rip meat. Canines are huge, and even on domestic animals they can be terrifying (show cat and dog photo). Incisors are tiny. The molars are sharp to shred meat.
Look at real carnivore skull to see teeth (e.g. I have cat skull with upper jaw including canines)

Omnivore’s teeth:
We are omnivores.
Use a mirror to find the different kinds of teeth. (see notes)
Name incisors, canines, molars (use illustrations to show the different types)
Canines are there but small - between the two.
Incisors are more like herbivores though no where near as big.
Molars are between the two.
We are omnivores. Same as bears and racoons.

Notes: 

Students are distracted from the task at hand (looking at their teeth) with the mirror. Try looking in partner’s mouth for different kinds of teeth.

The students were very interested in the different herbivore jaws.

Grades taught: 
Gr 1
Gr 2
Gr 3
Gr 4
Gr 5
Gr 6
Teacher: 
Ingrid
Romy Cooper
Stephanie Monaghan
Tracy Povey
Teaching site: 
General Gordon Elementary
General Gordon Elementary Science Club
Horse riding stables, Richmond
Activity originally developed and delivered: 

Gordon Elementary for Romy Coopers class