Grade Level (K-1)
- The students will have an experience with a different type of an egg.
- The students will understand more about reptiles.
- The students will understand that reptiles (dinosaurs) did not hatch from
eggs with hard shells, like those of chickens.
- The Fossil Factory by Niles, Douglas, and Gregory Eldredge
- 5 raw chicken eggs
- 5 glasses of vinegar
- 5 glasses of water
- A spoon
- Newspaper to cover table
- Paper to draw on
- Drawing utensils
- One day before the lesson, place the 5 eggs in 5 cups of vinegar.
Make sure the egg is fully submerged. The vinegar will dissolve the
- Explain to students about characteristics of reptiles and
- Reptiles emerge from their eggs fully shaped.
- A reptile egg has a tough, leathery shell with a built in food supply.
- Tough shells allowed eggs to become fossilized.
- Some reptiles not only have thick shells on their babies, they are on
themselves as well. (Discuss class pet - turtle)
- During center time, take one egg out of vinegar with a spoon.
- Let the students GENTLY squeeze the egg to find out how it feels. (Egg
will break if squeezed too hard)
- Discuss how it feels.
- Discuss what you see.
- Store in a glass of water if it is to be used again.
- Have children write and draw a picture about the experience that they just
- The students will be able to discuss that different animals come from
different types of eggs.
- The students will be able to tell the difference between some
reptiles and some other animals. For example, they should know that our
class turtle is a reptile, but a dog is not.
- The students will communicate their new knowledge about dinosaur eggs in
the writing and drawing.
Reflection & Extension:
I have not completed this lesson with the children yet. I anticipate problems
of eggs breaking before each child has a turn to feel the "reptile" egg. To
compensate for this, it may be a good idea to make a few extra eggs.
Once again, I think it would be fun to make a book out of the students' work.
Another good extension activity would be to talk about other kinds of eggs.
For example, you could discuss soft and squishy amphibian eggs.