Zoology: (first circle)

Need for lesson - Pictures of some mollusks including a squid, octopus, and clams. If availabe, some mollusk samples having the two shells

Index File card

can be pasted onto an index file card for quick reference


Zoology 47

We have learned about some ocean invertebrates such as crustaceans and echinoderms. In the past we talked about land snails, which are a kind of mollusk. Today we are going to talk about mollusks again, only this time we want to find out about those that live in the water. Mollusks are soft-bodied invertebrates. Some have a shell that covers their soft body and others do not have a shell. Snails, slugs, clams, mussels, squid, and the octopus are kinds of mollusks.

Clams, mussels, oysters, and scallops are all mollusks that have two shells. These shells close together tightly for protection with their whole body inside of the shell. Usually they will open their shell just a small amount, so they can pull water in and out their body for oxygen and food. They often live at the bottom of water and bury themselves in the sand or mud with only a piece of their shells sticking out. Others will attach themselves to rocks.

A squid is also a mollusk. They do not have shells. They have soft bodies with a large head. Squids can grow to different lengths. There are squid that are so long, they are called a giant squids. Squids have 8 arms around its mouth. Squids are extremely fast swimmers, in fact they are faster than any other invertebrate.

An octopus is also a kind of mollusk. What do you know about an octopus? They too have 8 arms around their mouths and a large head. Octopus are bottom dweller, meaning they like to be near the bottom of the ocean floor. They live in holes or crevices of rocks. They hunt for their food at night. They eat animals like crabs and crayfish. They change their color to match their surroundings and just wait for its prey to pass by and then just grab it with its long arms. they have suction cups along the arms which help it to catch their food. Some other neat things about an octopus is that they have three hearts and a very good sense of touch. they are also considered to be very intelligent, meaning they are a smart invertebrate.



Thorny Oyster (from my brother-in-law)




Paper Plate Octopus - Provide paper plates, paint, and strips of paper for the arms, and cheerios for the suction cups. Children can paint the plate for the octopus head, add eyes, glue on some arms and cheerios.


Art - Octopus

Additional Work:

Octopus Art and Book




Eight Arms (childfun.com)

Once I saw an octopus, octopus, octopus
Once I saw an octopus down deep in the sea.
Then out came her eight arms, her eight arms, her eight arms,
Then out came her eight arms, to swim with me!

Science:  (second circle)

Need for lesson - Planet art activity. White circles cut out of paper, in different sizes, ( I use the Geometric Cabinet tray for circles. I've cut them out and at other times I have had the children trace and cut them out. You could do both, for younger and older children.) planet labels, paints, sun shapes, and long sheets of black paper.

Have a review of the planets with a little description of each one. I have a little booklet that I put together and the children can make one as well. I read this and then demonstrate the art activity. Any book will work to just give a brief description of each planet.


Solar System Painting - These come out really beautiful when they are all painted. It is a fun activity for the children that involves two steps. On one table I have all the circles cut (or the children could trace and cut out), the black paper, sun shapes, and  labels of each planet name. First the children glue the planets and labels to the black paper. They then take these to another table to paint the planets. I found a nice little chart from kidssoup.com to hang up above table or any Solar System poster could work, if you would like have one hung up.


Planets and Labels


Painting Planets


Solar System Art

Additional Works:

Planet Booklet (for review)


Planet Booklet (MontessoriPrintShop.com)